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Theorem atantan 24770
Description: The arctangent function is an inverse to tan. (Contributed by Mario Carneiro, 5-Apr-2015.)
Assertion
Ref Expression
atantan ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (arctan‘(tan‘𝐴)) = 𝐴)

Proof of Theorem atantan
StepHypRef Expression
1 cosne0 24396 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (cos‘𝐴) ≠ 0)
2 atandmtan 24767 . . . 4 ((𝐴 ∈ ℂ ∧ (cos‘𝐴) ≠ 0) → (tan‘𝐴) ∈ dom arctan)
31, 2syldan 488 . . 3 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (tan‘𝐴) ∈ dom arctan)
4 atanval 24731 . . 3 ((tan‘𝐴) ∈ dom arctan → (arctan‘(tan‘𝐴)) = ((i / 2) · ((log‘(1 − (i · (tan‘𝐴)))) − (log‘(1 + (i · (tan‘𝐴)))))))
53, 4syl 17 . 2 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (arctan‘(tan‘𝐴)) = ((i / 2) · ((log‘(1 − (i · (tan‘𝐴)))) − (log‘(1 + (i · (tan‘𝐴)))))))
6 ax-1cn 10107 . . . . . . 7 1 ∈ ℂ
7 ax-icn 10108 . . . . . . . 8 i ∈ ℂ
8 tancl 14979 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (cos‘𝐴) ≠ 0) → (tan‘𝐴) ∈ ℂ)
91, 8syldan 488 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (tan‘𝐴) ∈ ℂ)
10 mulcl 10133 . . . . . . . 8 ((i ∈ ℂ ∧ (tan‘𝐴) ∈ ℂ) → (i · (tan‘𝐴)) ∈ ℂ)
117, 9, 10sylancr 698 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (tan‘𝐴)) ∈ ℂ)
12 addcl 10131 . . . . . . 7 ((1 ∈ ℂ ∧ (i · (tan‘𝐴)) ∈ ℂ) → (1 + (i · (tan‘𝐴))) ∈ ℂ)
136, 11, 12sylancr 698 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (1 + (i · (tan‘𝐴))) ∈ ℂ)
14 atandm2 24724 . . . . . . . 8 ((tan‘𝐴) ∈ dom arctan ↔ ((tan‘𝐴) ∈ ℂ ∧ (1 − (i · (tan‘𝐴))) ≠ 0 ∧ (1 + (i · (tan‘𝐴))) ≠ 0))
153, 14sylib 208 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((tan‘𝐴) ∈ ℂ ∧ (1 − (i · (tan‘𝐴))) ≠ 0 ∧ (1 + (i · (tan‘𝐴))) ≠ 0))
1615simp3d 1136 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (1 + (i · (tan‘𝐴))) ≠ 0)
1713, 16logcld 24437 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (log‘(1 + (i · (tan‘𝐴)))) ∈ ℂ)
18 subcl 10393 . . . . . . 7 ((1 ∈ ℂ ∧ (i · (tan‘𝐴)) ∈ ℂ) → (1 − (i · (tan‘𝐴))) ∈ ℂ)
196, 11, 18sylancr 698 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (1 − (i · (tan‘𝐴))) ∈ ℂ)
2015simp2d 1135 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (1 − (i · (tan‘𝐴))) ≠ 0)
2119, 20logcld 24437 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (log‘(1 − (i · (tan‘𝐴)))) ∈ ℂ)
2217, 21negsubdi2d 10521 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) = ((log‘(1 − (i · (tan‘𝐴)))) − (log‘(1 + (i · (tan‘𝐴))))))
23 efsub 14950 . . . . . . . . 9 (((log‘(1 + (i · (tan‘𝐴)))) ∈ ℂ ∧ (log‘(1 − (i · (tan‘𝐴)))) ∈ ℂ) → (exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴)))))) = ((exp‘(log‘(1 + (i · (tan‘𝐴))))) / (exp‘(log‘(1 − (i · (tan‘𝐴)))))))
2417, 21, 23syl2anc 696 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴)))))) = ((exp‘(log‘(1 + (i · (tan‘𝐴))))) / (exp‘(log‘(1 − (i · (tan‘𝐴)))))))
25 coscl 14977 . . . . . . . . . . . . 13 (𝐴 ∈ ℂ → (cos‘𝐴) ∈ ℂ)
2625adantr 472 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (cos‘𝐴) ∈ ℂ)
27 sincl 14976 . . . . . . . . . . . . . 14 (𝐴 ∈ ℂ → (sin‘𝐴) ∈ ℂ)
2827adantr 472 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (sin‘𝐴) ∈ ℂ)
29 mulcl 10133 . . . . . . . . . . . . 13 ((i ∈ ℂ ∧ (sin‘𝐴) ∈ ℂ) → (i · (sin‘𝐴)) ∈ ℂ)
307, 28, 29sylancr 698 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (sin‘𝐴)) ∈ ℂ)
3126, 30, 26, 1divdird 10952 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) + (i · (sin‘𝐴))) / (cos‘𝐴)) = (((cos‘𝐴) / (cos‘𝐴)) + ((i · (sin‘𝐴)) / (cos‘𝐴))))
3226, 1dividd 10912 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((cos‘𝐴) / (cos‘𝐴)) = 1)
337a1i 11 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → i ∈ ℂ)
3433, 28, 26, 1divassd 10949 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · (sin‘𝐴)) / (cos‘𝐴)) = (i · ((sin‘𝐴) / (cos‘𝐴))))
35 tanval 14978 . . . . . . . . . . . . . . 15 ((𝐴 ∈ ℂ ∧ (cos‘𝐴) ≠ 0) → (tan‘𝐴) = ((sin‘𝐴) / (cos‘𝐴)))
361, 35syldan 488 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (tan‘𝐴) = ((sin‘𝐴) / (cos‘𝐴)))
3736oveq2d 6781 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (tan‘𝐴)) = (i · ((sin‘𝐴) / (cos‘𝐴))))
3834, 37eqtr4d 2761 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · (sin‘𝐴)) / (cos‘𝐴)) = (i · (tan‘𝐴)))
3932, 38oveq12d 6783 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) / (cos‘𝐴)) + ((i · (sin‘𝐴)) / (cos‘𝐴))) = (1 + (i · (tan‘𝐴))))
4031, 39eqtrd 2758 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) + (i · (sin‘𝐴))) / (cos‘𝐴)) = (1 + (i · (tan‘𝐴))))
41 efival 15002 . . . . . . . . . . . 12 (𝐴 ∈ ℂ → (exp‘(i · 𝐴)) = ((cos‘𝐴) + (i · (sin‘𝐴))))
4241adantr 472 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(i · 𝐴)) = ((cos‘𝐴) + (i · (sin‘𝐴))))
4342oveq1d 6780 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((exp‘(i · 𝐴)) / (cos‘𝐴)) = (((cos‘𝐴) + (i · (sin‘𝐴))) / (cos‘𝐴)))
44 eflog 24443 . . . . . . . . . . 11 (((1 + (i · (tan‘𝐴))) ∈ ℂ ∧ (1 + (i · (tan‘𝐴))) ≠ 0) → (exp‘(log‘(1 + (i · (tan‘𝐴))))) = (1 + (i · (tan‘𝐴))))
4513, 16, 44syl2anc 696 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(log‘(1 + (i · (tan‘𝐴))))) = (1 + (i · (tan‘𝐴))))
4640, 43, 453eqtr4d 2768 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((exp‘(i · 𝐴)) / (cos‘𝐴)) = (exp‘(log‘(1 + (i · (tan‘𝐴))))))
4726, 30, 26, 1divsubdird 10953 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) − (i · (sin‘𝐴))) / (cos‘𝐴)) = (((cos‘𝐴) / (cos‘𝐴)) − ((i · (sin‘𝐴)) / (cos‘𝐴))))
4832, 38oveq12d 6783 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) / (cos‘𝐴)) − ((i · (sin‘𝐴)) / (cos‘𝐴))) = (1 − (i · (tan‘𝐴))))
4947, 48eqtrd 2758 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((cos‘𝐴) − (i · (sin‘𝐴))) / (cos‘𝐴)) = (1 − (i · (tan‘𝐴))))
50 negcl 10394 . . . . . . . . . . . . . . 15 (𝐴 ∈ ℂ → -𝐴 ∈ ℂ)
5150adantr 472 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -𝐴 ∈ ℂ)
52 efival 15002 . . . . . . . . . . . . . 14 (-𝐴 ∈ ℂ → (exp‘(i · -𝐴)) = ((cos‘-𝐴) + (i · (sin‘-𝐴))))
5351, 52syl 17 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(i · -𝐴)) = ((cos‘-𝐴) + (i · (sin‘-𝐴))))
54 cosneg 14997 . . . . . . . . . . . . . . 15 (𝐴 ∈ ℂ → (cos‘-𝐴) = (cos‘𝐴))
5554adantr 472 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (cos‘-𝐴) = (cos‘𝐴))
56 sinneg 14996 . . . . . . . . . . . . . . . . 17 (𝐴 ∈ ℂ → (sin‘-𝐴) = -(sin‘𝐴))
5756adantr 472 . . . . . . . . . . . . . . . 16 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (sin‘-𝐴) = -(sin‘𝐴))
5857oveq2d 6781 . . . . . . . . . . . . . . 15 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (sin‘-𝐴)) = (i · -(sin‘𝐴)))
59 mulneg2 10580 . . . . . . . . . . . . . . . 16 ((i ∈ ℂ ∧ (sin‘𝐴) ∈ ℂ) → (i · -(sin‘𝐴)) = -(i · (sin‘𝐴)))
607, 28, 59sylancr 698 . . . . . . . . . . . . . . 15 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · -(sin‘𝐴)) = -(i · (sin‘𝐴)))
6158, 60eqtrd 2758 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (sin‘-𝐴)) = -(i · (sin‘𝐴)))
6255, 61oveq12d 6783 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((cos‘-𝐴) + (i · (sin‘-𝐴))) = ((cos‘𝐴) + -(i · (sin‘𝐴))))
6353, 62eqtrd 2758 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(i · -𝐴)) = ((cos‘𝐴) + -(i · (sin‘𝐴))))
64 simpl 474 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → 𝐴 ∈ ℂ)
65 mulneg2 10580 . . . . . . . . . . . . . 14 ((i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (i · -𝐴) = -(i · 𝐴))
667, 64, 65sylancr 698 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · -𝐴) = -(i · 𝐴))
6766fveq2d 6308 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(i · -𝐴)) = (exp‘-(i · 𝐴)))
6826, 30negsubd 10511 . . . . . . . . . . . 12 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((cos‘𝐴) + -(i · (sin‘𝐴))) = ((cos‘𝐴) − (i · (sin‘𝐴))))
6963, 67, 683eqtr3d 2766 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘-(i · 𝐴)) = ((cos‘𝐴) − (i · (sin‘𝐴))))
7069oveq1d 6780 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((exp‘-(i · 𝐴)) / (cos‘𝐴)) = (((cos‘𝐴) − (i · (sin‘𝐴))) / (cos‘𝐴)))
71 eflog 24443 . . . . . . . . . . 11 (((1 − (i · (tan‘𝐴))) ∈ ℂ ∧ (1 − (i · (tan‘𝐴))) ≠ 0) → (exp‘(log‘(1 − (i · (tan‘𝐴))))) = (1 − (i · (tan‘𝐴))))
7219, 20, 71syl2anc 696 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(log‘(1 − (i · (tan‘𝐴))))) = (1 − (i · (tan‘𝐴))))
7349, 70, 723eqtr4d 2768 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((exp‘-(i · 𝐴)) / (cos‘𝐴)) = (exp‘(log‘(1 − (i · (tan‘𝐴))))))
7446, 73oveq12d 6783 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((exp‘(i · 𝐴)) / (cos‘𝐴)) / ((exp‘-(i · 𝐴)) / (cos‘𝐴))) = ((exp‘(log‘(1 + (i · (tan‘𝐴))))) / (exp‘(log‘(1 − (i · (tan‘𝐴)))))))
75 mulcl 10133 . . . . . . . . . . . 12 ((i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (i · 𝐴) ∈ ℂ)
767, 64, 75sylancr 698 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · 𝐴) ∈ ℂ)
77 efcl 14933 . . . . . . . . . . 11 ((i · 𝐴) ∈ ℂ → (exp‘(i · 𝐴)) ∈ ℂ)
7876, 77syl 17 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘(i · 𝐴)) ∈ ℂ)
7976negcld 10492 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -(i · 𝐴) ∈ ℂ)
80 efcl 14933 . . . . . . . . . . 11 (-(i · 𝐴) ∈ ℂ → (exp‘-(i · 𝐴)) ∈ ℂ)
8179, 80syl 17 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘-(i · 𝐴)) ∈ ℂ)
82 efne0 14947 . . . . . . . . . . 11 (-(i · 𝐴) ∈ ℂ → (exp‘-(i · 𝐴)) ≠ 0)
8379, 82syl 17 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘-(i · 𝐴)) ≠ 0)
8478, 81, 26, 83, 1divcan7d 10942 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((exp‘(i · 𝐴)) / (cos‘𝐴)) / ((exp‘-(i · 𝐴)) / (cos‘𝐴))) = ((exp‘(i · 𝐴)) / (exp‘-(i · 𝐴))))
85 efsub 14950 . . . . . . . . . 10 (((i · 𝐴) ∈ ℂ ∧ -(i · 𝐴) ∈ ℂ) → (exp‘((i · 𝐴) − -(i · 𝐴))) = ((exp‘(i · 𝐴)) / (exp‘-(i · 𝐴))))
8676, 79, 85syl2anc 696 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘((i · 𝐴) − -(i · 𝐴))) = ((exp‘(i · 𝐴)) / (exp‘-(i · 𝐴))))
8776, 76subnegd 10512 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · 𝐴) − -(i · 𝐴)) = ((i · 𝐴) + (i · 𝐴)))
88762timesd 11388 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (i · 𝐴)) = ((i · 𝐴) + (i · 𝐴)))
8987, 88eqtr4d 2761 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · 𝐴) − -(i · 𝐴)) = (2 · (i · 𝐴)))
9089fveq2d 6308 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘((i · 𝐴) − -(i · 𝐴))) = (exp‘(2 · (i · 𝐴))))
9184, 86, 903eqtr2d 2764 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((exp‘(i · 𝐴)) / (cos‘𝐴)) / ((exp‘-(i · 𝐴)) / (cos‘𝐴))) = (exp‘(2 · (i · 𝐴))))
9224, 74, 913eqtr2d 2764 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴)))))) = (exp‘(2 · (i · 𝐴))))
9392fveq2d 6308 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (log‘(exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))))) = (log‘(exp‘(2 · (i · 𝐴)))))
943adantr 472 . . . . . . . . 9 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (tan‘𝐴) ∈ dom arctan)
9551adantr 472 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → -𝐴 ∈ ℂ)
9664adantr 472 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → 𝐴 ∈ ℂ)
9796renegd 14069 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘-𝐴) = -(ℜ‘𝐴))
9896recld 14054 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘𝐴) ∈ ℝ)
9998renegcld 10570 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → -(ℜ‘𝐴) ∈ ℝ)
100 simpr 479 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘𝐴) < 0)
10198lt0neg1d 10710 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → ((ℜ‘𝐴) < 0 ↔ 0 < -(ℜ‘𝐴)))
102100, 101mpbid 222 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → 0 < -(ℜ‘𝐴))
103 eliooord 12347 . . . . . . . . . . . . . . . . . . 19 ((ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2)) → (-(π / 2) < (ℜ‘𝐴) ∧ (ℜ‘𝐴) < (π / 2)))
104103adantl 473 . . . . . . . . . . . . . . . . . 18 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (-(π / 2) < (ℜ‘𝐴) ∧ (ℜ‘𝐴) < (π / 2)))
105104simpld 477 . . . . . . . . . . . . . . . . 17 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -(π / 2) < (ℜ‘𝐴))
106105adantr 472 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → -(π / 2) < (ℜ‘𝐴))
107 halfpire 24336 . . . . . . . . . . . . . . . . 17 (π / 2) ∈ ℝ
108 ltnegcon1 10642 . . . . . . . . . . . . . . . . 17 (((π / 2) ∈ ℝ ∧ (ℜ‘𝐴) ∈ ℝ) → (-(π / 2) < (ℜ‘𝐴) ↔ -(ℜ‘𝐴) < (π / 2)))
109107, 98, 108sylancr 698 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (-(π / 2) < (ℜ‘𝐴) ↔ -(ℜ‘𝐴) < (π / 2)))
110106, 109mpbid 222 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → -(ℜ‘𝐴) < (π / 2))
111 0xr 10199 . . . . . . . . . . . . . . . 16 0 ∈ ℝ*
112107rexri 10210 . . . . . . . . . . . . . . . 16 (π / 2) ∈ ℝ*
113 elioo2 12330 . . . . . . . . . . . . . . . 16 ((0 ∈ ℝ* ∧ (π / 2) ∈ ℝ*) → (-(ℜ‘𝐴) ∈ (0(,)(π / 2)) ↔ (-(ℜ‘𝐴) ∈ ℝ ∧ 0 < -(ℜ‘𝐴) ∧ -(ℜ‘𝐴) < (π / 2))))
114111, 112, 113mp2an 710 . . . . . . . . . . . . . . 15 (-(ℜ‘𝐴) ∈ (0(,)(π / 2)) ↔ (-(ℜ‘𝐴) ∈ ℝ ∧ 0 < -(ℜ‘𝐴) ∧ -(ℜ‘𝐴) < (π / 2)))
11599, 102, 110, 114syl3anbrc 1383 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → -(ℜ‘𝐴) ∈ (0(,)(π / 2)))
11697, 115eqeltrd 2803 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘-𝐴) ∈ (0(,)(π / 2)))
117 tanregt0 24405 . . . . . . . . . . . . 13 ((-𝐴 ∈ ℂ ∧ (ℜ‘-𝐴) ∈ (0(,)(π / 2))) → 0 < (ℜ‘(tan‘-𝐴)))
11895, 116, 117syl2anc 696 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → 0 < (ℜ‘(tan‘-𝐴)))
119 tanneg 14998 . . . . . . . . . . . . . . . 16 ((𝐴 ∈ ℂ ∧ (cos‘𝐴) ≠ 0) → (tan‘-𝐴) = -(tan‘𝐴))
1201, 119syldan 488 . . . . . . . . . . . . . . 15 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (tan‘-𝐴) = -(tan‘𝐴))
121120adantr 472 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (tan‘-𝐴) = -(tan‘𝐴))
122121fveq2d 6308 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘(tan‘-𝐴)) = (ℜ‘-(tan‘𝐴)))
1239adantr 472 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (tan‘𝐴) ∈ ℂ)
124123renegd 14069 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘-(tan‘𝐴)) = -(ℜ‘(tan‘𝐴)))
125122, 124eqtrd 2758 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘(tan‘-𝐴)) = -(ℜ‘(tan‘𝐴)))
126118, 125breqtrd 4786 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → 0 < -(ℜ‘(tan‘𝐴)))
1279recld 14054 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℜ‘(tan‘𝐴)) ∈ ℝ)
128127adantr 472 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘(tan‘𝐴)) ∈ ℝ)
129128lt0neg1d 10710 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → ((ℜ‘(tan‘𝐴)) < 0 ↔ 0 < -(ℜ‘(tan‘𝐴))))
130126, 129mpbird 247 . . . . . . . . . 10 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘(tan‘𝐴)) < 0)
131130lt0ne0d 10706 . . . . . . . . 9 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → (ℜ‘(tan‘𝐴)) ≠ 0)
132 atanlogsub 24763 . . . . . . . . 9 (((tan‘𝐴) ∈ dom arctan ∧ (ℜ‘(tan‘𝐴)) ≠ 0) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
13394, 131, 132syl2anc 696 . . . . . . . 8 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) < 0) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
134 1re 10152 . . . . . . . . . . . . 13 1 ∈ ℝ
135 ioossre 12349 . . . . . . . . . . . . . 14 (-1(,)1) ⊆ ℝ
1367a1i 11 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → i ∈ ℂ)
13711adantr 472 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (tan‘𝐴)) ∈ ℂ)
138 ine0 10578 . . . . . . . . . . . . . . . . 17 i ≠ 0
139138a1i 11 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → i ≠ 0)
140 ixi 10769 . . . . . . . . . . . . . . . . . . 19 (i · i) = -1
141140oveq1i 6775 . . . . . . . . . . . . . . . . . 18 ((i · i) · (tan‘𝐴)) = (-1 · (tan‘𝐴))
1429adantr 472 . . . . . . . . . . . . . . . . . . . 20 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (tan‘𝐴) ∈ ℂ)
143142mulm1d 10595 . . . . . . . . . . . . . . . . . . 19 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (-1 · (tan‘𝐴)) = -(tan‘𝐴))
144120adantr 472 . . . . . . . . . . . . . . . . . . 19 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (tan‘-𝐴) = -(tan‘𝐴))
145143, 144eqtr4d 2761 . . . . . . . . . . . . . . . . . 18 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (-1 · (tan‘𝐴)) = (tan‘-𝐴))
146141, 145syl5eq 2770 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((i · i) · (tan‘𝐴)) = (tan‘-𝐴))
147136, 136, 142mulassd 10176 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((i · i) · (tan‘𝐴)) = (i · (i · (tan‘𝐴))))
148140oveq1i 6775 . . . . . . . . . . . . . . . . . . . 20 ((i · i) · 𝐴) = (-1 · 𝐴)
14964adantr 472 . . . . . . . . . . . . . . . . . . . . 21 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → 𝐴 ∈ ℂ)
150149mulm1d 10595 . . . . . . . . . . . . . . . . . . . 20 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (-1 · 𝐴) = -𝐴)
151148, 150syl5eq 2770 . . . . . . . . . . . . . . . . . . 19 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((i · i) · 𝐴) = -𝐴)
152136, 136, 149mulassd 10176 . . . . . . . . . . . . . . . . . . 19 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((i · i) · 𝐴) = (i · (i · 𝐴)))
153151, 152eqtr3d 2760 . . . . . . . . . . . . . . . . . 18 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → -𝐴 = (i · (i · 𝐴)))
154153fveq2d 6308 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (tan‘-𝐴) = (tan‘(i · (i · 𝐴))))
155146, 147, 1543eqtr3d 2766 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (i · (tan‘𝐴))) = (tan‘(i · (i · 𝐴))))
156136, 137, 139, 155mvllmuld 10970 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (tan‘𝐴)) = ((tan‘(i · (i · 𝐴))) / i))
15776adantr 472 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · 𝐴) ∈ ℂ)
158 reim 13969 . . . . . . . . . . . . . . . . . . . 20 (𝐴 ∈ ℂ → (ℜ‘𝐴) = (ℑ‘(i · 𝐴)))
159158adantr 472 . . . . . . . . . . . . . . . . . . 19 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℜ‘𝐴) = (ℑ‘(i · 𝐴)))
160159eqeq1d 2726 . . . . . . . . . . . . . . . . . 18 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((ℜ‘𝐴) = 0 ↔ (ℑ‘(i · 𝐴)) = 0))
161160biimpa 502 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (ℑ‘(i · 𝐴)) = 0)
162157, 161reim0bd 14060 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · 𝐴) ∈ ℝ)
163 tanhbnd 15011 . . . . . . . . . . . . . . . 16 ((i · 𝐴) ∈ ℝ → ((tan‘(i · (i · 𝐴))) / i) ∈ (-1(,)1))
164162, 163syl 17 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((tan‘(i · (i · 𝐴))) / i) ∈ (-1(,)1))
165156, 164eqeltrd 2803 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (tan‘𝐴)) ∈ (-1(,)1))
166135, 165sseldi 3707 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (tan‘𝐴)) ∈ ℝ)
167 readdcl 10132 . . . . . . . . . . . . 13 ((1 ∈ ℝ ∧ (i · (tan‘𝐴)) ∈ ℝ) → (1 + (i · (tan‘𝐴))) ∈ ℝ)
168134, 166, 167sylancr 698 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (1 + (i · (tan‘𝐴))) ∈ ℝ)
169 df-neg 10382 . . . . . . . . . . . . . 14 -1 = (0 − 1)
170 eliooord 12347 . . . . . . . . . . . . . . . 16 ((i · (tan‘𝐴)) ∈ (-1(,)1) → (-1 < (i · (tan‘𝐴)) ∧ (i · (tan‘𝐴)) < 1))
171165, 170syl 17 . . . . . . . . . . . . . . 15 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (-1 < (i · (tan‘𝐴)) ∧ (i · (tan‘𝐴)) < 1))
172171simpld 477 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → -1 < (i · (tan‘𝐴)))
173169, 172syl5eqbrr 4796 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (0 − 1) < (i · (tan‘𝐴)))
174 0red 10154 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → 0 ∈ ℝ)
175134a1i 11 . . . . . . . . . . . . . 14 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → 1 ∈ ℝ)
176174, 175, 166ltsubadd2d 10738 . . . . . . . . . . . . 13 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((0 − 1) < (i · (tan‘𝐴)) ↔ 0 < (1 + (i · (tan‘𝐴)))))
177173, 176mpbid 222 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → 0 < (1 + (i · (tan‘𝐴))))
178168, 177elrpd 11983 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (1 + (i · (tan‘𝐴))) ∈ ℝ+)
179178relogcld 24489 . . . . . . . . . 10 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (log‘(1 + (i · (tan‘𝐴)))) ∈ ℝ)
180171simprd 482 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (i · (tan‘𝐴)) < 1)
181 difrp 11982 . . . . . . . . . . . . 13 (((i · (tan‘𝐴)) ∈ ℝ ∧ 1 ∈ ℝ) → ((i · (tan‘𝐴)) < 1 ↔ (1 − (i · (tan‘𝐴))) ∈ ℝ+))
182166, 134, 181sylancl 697 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((i · (tan‘𝐴)) < 1 ↔ (1 − (i · (tan‘𝐴))) ∈ ℝ+))
183180, 182mpbid 222 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (1 − (i · (tan‘𝐴))) ∈ ℝ+)
184183relogcld 24489 . . . . . . . . . 10 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → (log‘(1 − (i · (tan‘𝐴)))) ∈ ℝ)
185179, 184resubcld 10571 . . . . . . . . 9 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ℝ)
186 relogrn 24428 . . . . . . . . 9 (((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ℝ → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
187185, 186syl 17 . . . . . . . 8 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ (ℜ‘𝐴) = 0) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
1883adantr 472 . . . . . . . . 9 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → (tan‘𝐴) ∈ dom arctan)
18964adantr 472 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → 𝐴 ∈ ℂ)
190189recld 14054 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → (ℜ‘𝐴) ∈ ℝ)
191 simpr 479 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → 0 < (ℜ‘𝐴))
192104simprd 482 . . . . . . . . . . . . 13 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℜ‘𝐴) < (π / 2))
193192adantr 472 . . . . . . . . . . . 12 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → (ℜ‘𝐴) < (π / 2))
194 elioo2 12330 . . . . . . . . . . . . 13 ((0 ∈ ℝ* ∧ (π / 2) ∈ ℝ*) → ((ℜ‘𝐴) ∈ (0(,)(π / 2)) ↔ ((ℜ‘𝐴) ∈ ℝ ∧ 0 < (ℜ‘𝐴) ∧ (ℜ‘𝐴) < (π / 2))))
195111, 112, 194mp2an 710 . . . . . . . . . . . 12 ((ℜ‘𝐴) ∈ (0(,)(π / 2)) ↔ ((ℜ‘𝐴) ∈ ℝ ∧ 0 < (ℜ‘𝐴) ∧ (ℜ‘𝐴) < (π / 2)))
196190, 191, 193, 195syl3anbrc 1383 . . . . . . . . . . 11 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → (ℜ‘𝐴) ∈ (0(,)(π / 2)))
197 tanregt0 24405 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (0(,)(π / 2))) → 0 < (ℜ‘(tan‘𝐴)))
198189, 196, 197syl2anc 696 . . . . . . . . . 10 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → 0 < (ℜ‘(tan‘𝐴)))
199198gt0ne0d 10705 . . . . . . . . 9 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → (ℜ‘(tan‘𝐴)) ≠ 0)
200188, 199, 132syl2anc 696 . . . . . . . 8 (((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) ∧ 0 < (ℜ‘𝐴)) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
201 recl 13970 . . . . . . . . . 10 (𝐴 ∈ ℂ → (ℜ‘𝐴) ∈ ℝ)
202201adantr 472 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℜ‘𝐴) ∈ ℝ)
203 0re 10153 . . . . . . . . 9 0 ∈ ℝ
204 lttri4 10235 . . . . . . . . 9 (((ℜ‘𝐴) ∈ ℝ ∧ 0 ∈ ℝ) → ((ℜ‘𝐴) < 0 ∨ (ℜ‘𝐴) = 0 ∨ 0 < (ℜ‘𝐴)))
205202, 203, 204sylancl 697 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((ℜ‘𝐴) < 0 ∨ (ℜ‘𝐴) = 0 ∨ 0 < (ℜ‘𝐴)))
206133, 187, 200, 205mpjao3dan 1508 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log)
207 logef 24448 . . . . . . 7 (((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) ∈ ran log → (log‘(exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))))) = ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))))
208206, 207syl 17 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (log‘(exp‘((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))))) = ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))))
209 2cn 11204 . . . . . . . . 9 2 ∈ ℂ
210 mulcl 10133 . . . . . . . . 9 ((2 ∈ ℂ ∧ (i · 𝐴) ∈ ℂ) → (2 · (i · 𝐴)) ∈ ℂ)
211209, 76, 210sylancr 698 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (i · 𝐴)) ∈ ℂ)
212 picn 24331 . . . . . . . . . . . 12 π ∈ ℂ
213 2ne0 11226 . . . . . . . . . . . 12 2 ≠ 0
214 divneg 10832 . . . . . . . . . . . 12 ((π ∈ ℂ ∧ 2 ∈ ℂ ∧ 2 ≠ 0) → -(π / 2) = (-π / 2))
215212, 209, 213, 214mp3an 1537 . . . . . . . . . . 11 -(π / 2) = (-π / 2)
216215, 105syl5eqbrr 4796 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (-π / 2) < (ℜ‘𝐴))
217 pire 24330 . . . . . . . . . . . . 13 π ∈ ℝ
218217renegcli 10455 . . . . . . . . . . . 12 -π ∈ ℝ
219218a1i 11 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -π ∈ ℝ)
220 2re 11203 . . . . . . . . . . . 12 2 ∈ ℝ
221220a1i 11 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → 2 ∈ ℝ)
222 2pos 11225 . . . . . . . . . . . 12 0 < 2
223222a1i 11 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → 0 < 2)
224 ltdivmul 11011 . . . . . . . . . . 11 ((-π ∈ ℝ ∧ (ℜ‘𝐴) ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((-π / 2) < (ℜ‘𝐴) ↔ -π < (2 · (ℜ‘𝐴))))
225219, 202, 221, 223, 224syl112anc 1443 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((-π / 2) < (ℜ‘𝐴) ↔ -π < (2 · (ℜ‘𝐴))))
226216, 225mpbid 222 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -π < (2 · (ℜ‘𝐴)))
227 immul2 13997 . . . . . . . . . . 11 ((2 ∈ ℝ ∧ (i · 𝐴) ∈ ℂ) → (ℑ‘(2 · (i · 𝐴))) = (2 · (ℑ‘(i · 𝐴))))
228220, 76, 227sylancr 698 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℑ‘(2 · (i · 𝐴))) = (2 · (ℑ‘(i · 𝐴))))
229159oveq2d 6781 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (ℜ‘𝐴)) = (2 · (ℑ‘(i · 𝐴))))
230228, 229eqtr4d 2761 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℑ‘(2 · (i · 𝐴))) = (2 · (ℜ‘𝐴)))
231226, 230breqtrrd 4788 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -π < (ℑ‘(2 · (i · 𝐴))))
232 remulcl 10134 . . . . . . . . . . 11 ((2 ∈ ℝ ∧ (ℜ‘𝐴) ∈ ℝ) → (2 · (ℜ‘𝐴)) ∈ ℝ)
233220, 202, 232sylancr 698 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (ℜ‘𝐴)) ∈ ℝ)
234217a1i 11 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → π ∈ ℝ)
235 ltmuldiv2 11010 . . . . . . . . . . . 12 (((ℜ‘𝐴) ∈ ℝ ∧ π ∈ ℝ ∧ (2 ∈ ℝ ∧ 0 < 2)) → ((2 · (ℜ‘𝐴)) < π ↔ (ℜ‘𝐴) < (π / 2)))
236202, 234, 221, 223, 235syl112anc 1443 . . . . . . . . . . 11 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((2 · (ℜ‘𝐴)) < π ↔ (ℜ‘𝐴) < (π / 2)))
237192, 236mpbird 247 . . . . . . . . . 10 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (ℜ‘𝐴)) < π)
238233, 234, 237ltled 10298 . . . . . . . . 9 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (ℜ‘𝐴)) ≤ π)
239230, 238eqbrtrd 4782 . . . . . . . 8 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (ℑ‘(2 · (i · 𝐴))) ≤ π)
240 ellogrn 24426 . . . . . . . 8 ((2 · (i · 𝐴)) ∈ ran log ↔ ((2 · (i · 𝐴)) ∈ ℂ ∧ -π < (ℑ‘(2 · (i · 𝐴))) ∧ (ℑ‘(2 · (i · 𝐴))) ≤ π))
241211, 231, 239, 240syl3anbrc 1383 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · (i · 𝐴)) ∈ ran log)
242 logef 24448 . . . . . . 7 ((2 · (i · 𝐴)) ∈ ran log → (log‘(exp‘(2 · (i · 𝐴)))) = (2 · (i · 𝐴)))
243241, 242syl 17 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (log‘(exp‘(2 · (i · 𝐴)))) = (2 · (i · 𝐴)))
24493, 208, 2433eqtr3d 2766 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) = (2 · (i · 𝐴)))
245244negeqd 10388 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → -((log‘(1 + (i · (tan‘𝐴)))) − (log‘(1 − (i · (tan‘𝐴))))) = -(2 · (i · 𝐴)))
24622, 245eqtr3d 2760 . . 3 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((log‘(1 − (i · (tan‘𝐴)))) − (log‘(1 + (i · (tan‘𝐴))))) = -(2 · (i · 𝐴)))
247246oveq2d 6781 . 2 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i / 2) · ((log‘(1 − (i · (tan‘𝐴)))) − (log‘(1 + (i · (tan‘𝐴)))))) = ((i / 2) · -(2 · (i · 𝐴))))
248 halfcl 11370 . . . . 5 (i ∈ ℂ → (i / 2) ∈ ℂ)
2497, 248mp1i 13 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i / 2) ∈ ℂ)
250209a1i 11 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → 2 ∈ ℂ)
251249, 250, 79mulassd 10176 . . 3 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((i / 2) · 2) · -(i · 𝐴)) = ((i / 2) · (2 · -(i · 𝐴))))
2527, 209, 213divcan1i 10882 . . . . 5 ((i / 2) · 2) = i
253252oveq1i 6775 . . . 4 (((i / 2) · 2) · -(i · 𝐴)) = (i · -(i · 𝐴))
25433, 33, 51mulassd 10176 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · i) · -𝐴) = (i · (i · -𝐴)))
255140oveq1i 6775 . . . . . 6 ((i · i) · -𝐴) = (-1 · -𝐴)
256 mul2neg 10582 . . . . . . . 8 ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (-1 · -𝐴) = (1 · 𝐴))
2576, 64, 256sylancr 698 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (-1 · -𝐴) = (1 · 𝐴))
258 mulid2 10151 . . . . . . . 8 (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴)
259258adantr 472 . . . . . . 7 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (1 · 𝐴) = 𝐴)
260257, 259eqtrd 2758 . . . . . 6 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (-1 · -𝐴) = 𝐴)
261255, 260syl5eq 2770 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i · i) · -𝐴) = 𝐴)
26266oveq2d 6781 . . . . 5 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · (i · -𝐴)) = (i · -(i · 𝐴)))
263254, 261, 2623eqtr3rd 2767 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (i · -(i · 𝐴)) = 𝐴)
264253, 263syl5eq 2770 . . 3 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (((i / 2) · 2) · -(i · 𝐴)) = 𝐴)
265 mulneg2 10580 . . . . 5 ((2 ∈ ℂ ∧ (i · 𝐴) ∈ ℂ) → (2 · -(i · 𝐴)) = -(2 · (i · 𝐴)))
266209, 76, 265sylancr 698 . . . 4 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (2 · -(i · 𝐴)) = -(2 · (i · 𝐴)))
267266oveq2d 6781 . . 3 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i / 2) · (2 · -(i · 𝐴))) = ((i / 2) · -(2 · (i · 𝐴))))
268251, 264, 2673eqtr3rd 2767 . 2 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → ((i / 2) · -(2 · (i · 𝐴))) = 𝐴)
2695, 247, 2683eqtrd 2762 1 ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ∈ (-(π / 2)(,)(π / 2))) → (arctan‘(tan‘𝐴)) = 𝐴)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383  w3o 1071  w3a 1072   = wceq 1596  wcel 2103  wne 2896   class class class wbr 4760  dom cdm 5218  ran crn 5219  cfv 6001  (class class class)co 6765  cc 10047  cr 10048  0cc0 10049  1c1 10050  ici 10051   + caddc 10052   · cmul 10054  *cxr 10186   < clt 10187  cle 10188  cmin 10379  -cneg 10380   / cdiv 10797  2c2 11183  +crp 11946  (,)cioo 12289  cre 13957  cim 13958  expce 14912  sincsin 14914  cosccos 14915  tanctan 14916  πcpi 14917  logclog 24421  arctancatan 24711
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1835  ax-4 1850  ax-5 1952  ax-6 2018  ax-7 2054  ax-8 2105  ax-9 2112  ax-10 2132  ax-11 2147  ax-12 2160  ax-13 2355  ax-ext 2704  ax-rep 4879  ax-sep 4889  ax-nul 4897  ax-pow 4948  ax-pr 5011  ax-un 7066  ax-inf2 8651  ax-cnex 10105  ax-resscn 10106  ax-1cn 10107  ax-icn 10108  ax-addcl 10109  ax-addrcl 10110  ax-mulcl 10111  ax-mulrcl 10112  ax-mulcom 10113  ax-addass 10114  ax-mulass 10115  ax-distr 10116  ax-i2m1 10117  ax-1ne0 10118  ax-1rid 10119  ax-rnegex 10120  ax-rrecex 10121  ax-cnre 10122  ax-pre-lttri 10123  ax-pre-lttrn 10124  ax-pre-ltadd 10125  ax-pre-mulgt0 10126  ax-pre-sup 10127  ax-addf 10128  ax-mulf 10129
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1073  df-3an 1074  df-tru 1599  df-fal 1602  df-ex 1818  df-nf 1823  df-sb 2011  df-eu 2575  df-mo 2576  df-clab 2711  df-cleq 2717  df-clel 2720  df-nfc 2855  df-ne 2897  df-nel 3000  df-ral 3019  df-rex 3020  df-reu 3021  df-rmo 3022  df-rab 3023  df-v 3306  df-sbc 3542  df-csb 3640  df-dif 3683  df-un 3685  df-in 3687  df-ss 3694  df-pss 3696  df-nul 4024  df-if 4195  df-pw 4268  df-sn 4286  df-pr 4288  df-tp 4290  df-op 4292  df-uni 4545  df-int 4584  df-iun 4630  df-iin 4631  df-br 4761  df-opab 4821  df-mpt 4838  df-tr 4861  df-id 5128  df-eprel 5133  df-po 5139  df-so 5140  df-fr 5177  df-se 5178  df-we 5179  df-xp 5224  df-rel 5225  df-cnv 5226  df-co 5227  df-dm 5228  df-rn 5229  df-res 5230  df-ima 5231  df-pred 5793  df-ord 5839  df-on 5840  df-lim 5841  df-suc 5842  df-iota 5964  df-fun 6003  df-fn 6004  df-f 6005  df-f1 6006  df-fo 6007  df-f1o 6008  df-fv 6009  df-isom 6010  df-riota 6726  df-ov 6768  df-oprab 6769  df-mpt2 6770  df-of 7014  df-om 7183  df-1st 7285  df-2nd 7286  df-supp 7416  df-wrecs 7527  df-recs 7588  df-rdg 7626  df-1o 7680  df-2o 7681  df-oadd 7684  df-er 7862  df-map 7976  df-pm 7977  df-ixp 8026  df-en 8073  df-dom 8074  df-sdom 8075  df-fin 8076  df-fsupp 8392  df-fi 8433  df-sup 8464  df-inf 8465  df-oi 8531  df-card 8878  df-cda 9103  df-pnf 10189  df-mnf 10190  df-xr 10191  df-ltxr 10192  df-le 10193  df-sub 10381  df-neg 10382  df-div 10798  df-nn 11134  df-2 11192  df-3 11193  df-4 11194  df-5 11195  df-6 11196  df-7 11197  df-8 11198  df-9 11199  df-n0 11406  df-z 11491  df-dec 11607  df-uz 11801  df-q 11903  df-rp 11947  df-xneg 12060  df-xadd 12061  df-xmul 12062  df-ioo 12293  df-ioc 12294  df-ico 12295  df-icc 12296  df-fz 12441  df-fzo 12581  df-fl 12708  df-mod 12784  df-seq 12917  df-exp 12976  df-fac 13176  df-bc 13205  df-hash 13233  df-shft 13927  df-cj 13959  df-re 13960  df-im 13961  df-sqrt 14095  df-abs 14096  df-limsup 14322  df-clim 14339  df-rlim 14340  df-sum 14537  df-ef 14918  df-sin 14920  df-cos 14921  df-tan 14922  df-pi 14923  df-struct 15982  df-ndx 15983  df-slot 15984  df-base 15986  df-sets 15987  df-ress 15988  df-plusg 16077  df-mulr 16078  df-starv 16079  df-sca 16080  df-vsca 16081  df-ip 16082  df-tset 16083  df-ple 16084  df-ds 16087  df-unif 16088  df-hom 16089  df-cco 16090  df-rest 16206  df-topn 16207  df-0g 16225  df-gsum 16226  df-topgen 16227  df-pt 16228  df-prds 16231  df-xrs 16285  df-qtop 16290  df-imas 16291  df-xps 16293  df-mre 16369  df-mrc 16370  df-acs 16372  df-mgm 17364  df-sgrp 17406  df-mnd 17417  df-submnd 17458  df-mulg 17663  df-cntz 17871  df-cmn 18316  df-psmet 19861  df-xmet 19862  df-met 19863  df-bl 19864  df-mopn 19865  df-fbas 19866  df-fg 19867  df-cnfld 19870  df-top 20822  df-topon 20839  df-topsp 20860  df-bases 20873  df-cld 20946  df-ntr 20947  df-cls 20948  df-nei 21025  df-lp 21063  df-perf 21064  df-cn 21154  df-cnp 21155  df-haus 21242  df-tx 21488  df-hmeo 21681  df-fil 21772  df-fm 21864  df-flim 21865  df-flf 21866  df-xms 22247  df-ms 22248  df-tms 22249  df-cncf 22803  df-limc 23750  df-dv 23751  df-log 24423  df-atan 24714
This theorem is referenced by:  atantanb  24771  atan1  24775
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