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Theorem sinhval 16097

Description: Value of the hyperbolic sine of a complex number. (Contributed by Mario Carneiro, 4-Apr-2015.)

**Assertion**
Ref	Expression
sinhval	⊢ (𝐴 ∈ ℂ → ((sin‘(i · 𝐴)) / i) = (((exp‘𝐴) − (exp‘-𝐴)) / 2))

**Proof of Theorem sinhval**
Step	Hyp	Ref	Expression
1		ixi 11843	. . . . . . . . 9 ⊢ (i · i) = -1
2	1	oveq1i 7419	. . . . . . . 8 ⊢ ((i · i) · 𝐴) = (-1 · 𝐴)
3		ax-icn 11169	. . . . . . . . 9 ⊢ i ∈ ℂ
4		mulass 11198	. . . . . . . . 9 ⊢ ((i ∈ ℂ ∧ i ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((i · i) · 𝐴) = (i · (i · 𝐴)))
5	3, 3, 4	mp3an12 1452	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → ((i · i) · 𝐴) = (i · (i · 𝐴)))
6		mulm1 11655	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (-1 · 𝐴) = -𝐴)
7	2, 5, 6	3eqtr3a 2797	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (i · (i · 𝐴)) = -𝐴)
8	7	fveq2d 6896	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (i · 𝐴))) = (exp‘-𝐴))
9	3, 3	mulneg1i 11660	. . . . . . . . . 10 ⊢ (-i · i) = -(i · i)
10	1	negeqi 11453	. . . . . . . . . . 11 ⊢ -(i · i) = --1
11		negneg1e1 12330	. . . . . . . . . . 11 ⊢ --1 = 1
12	10, 11	eqtri 2761	. . . . . . . . . 10 ⊢ -(i · i) = 1
13	9, 12	eqtri 2761	. . . . . . . . 9 ⊢ (-i · i) = 1
14	13	oveq1i 7419	. . . . . . . 8 ⊢ ((-i · i) · 𝐴) = (1 · 𝐴)
15		negicn 11461	. . . . . . . . 9 ⊢ -i ∈ ℂ
16		mulass 11198	. . . . . . . . 9 ⊢ ((-i ∈ ℂ ∧ i ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((-i · i) · 𝐴) = (-i · (i · 𝐴)))
17	15, 3, 16	mp3an12 1452	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → ((-i · i) · 𝐴) = (-i · (i · 𝐴)))
18		mullid 11213	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴)
19	14, 17, 18	3eqtr3a 2797	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (-i · (i · 𝐴)) = 𝐴)
20	19	fveq2d 6896	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (exp‘(-i · (i · 𝐴))) = (exp‘𝐴))
21	8, 20	oveq12d 7427	. . . . 5 ⊢ (𝐴 ∈ ℂ → ((exp‘(i · (i · 𝐴))) − (exp‘(-i · (i · 𝐴)))) = ((exp‘-𝐴) − (exp‘𝐴)))
22	21	oveq1d 7424	. . . 4 ⊢ (𝐴 ∈ ℂ → (((exp‘(i · (i · 𝐴))) − (exp‘(-i · (i · 𝐴)))) / (2 · i)) = (((exp‘-𝐴) − (exp‘𝐴)) / (2 · i)))
23		mulcl 11194	. . . . . 6 ⊢ ((i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (i · 𝐴) ∈ ℂ)
24	3, 23	mpan 689	. . . . 5 ⊢ (𝐴 ∈ ℂ → (i · 𝐴) ∈ ℂ)
25		sinval 16065	. . . . 5 ⊢ ((i · 𝐴) ∈ ℂ → (sin‘(i · 𝐴)) = (((exp‘(i · (i · 𝐴))) − (exp‘(-i · (i · 𝐴)))) / (2 · i)))
26	24, 25	syl 17	. . . 4 ⊢ (𝐴 ∈ ℂ → (sin‘(i · 𝐴)) = (((exp‘(i · (i · 𝐴))) − (exp‘(-i · (i · 𝐴)))) / (2 · i)))
27		irec 14165	. . . . . . . 8 ⊢ (1 / i) = -i
28	27	negeqi 11453	. . . . . . 7 ⊢ -(1 / i) = --i
29	3	negnegi 11530	. . . . . . 7 ⊢ --i = i
30	28, 29	eqtri 2761	. . . . . 6 ⊢ -(1 / i) = i
31	30	oveq1i 7419	. . . . 5 ⊢ (-(1 / i) · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) = (i · (((exp‘𝐴) − (exp‘-𝐴)) / 2))
32		ine0 11649	. . . . . . . 8 ⊢ i ≠ 0
33	3, 32	reccli 11944	. . . . . . 7 ⊢ (1 / i) ∈ ℂ
34		efcl 16026	. . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → (exp‘𝐴) ∈ ℂ)
35		negcl 11460	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → -𝐴 ∈ ℂ)
36		efcl 16026	. . . . . . . . . 10 ⊢ (-𝐴 ∈ ℂ → (exp‘-𝐴) ∈ ℂ)
37	35, 36	syl 17	. . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → (exp‘-𝐴) ∈ ℂ)
38	34, 37	subcld 11571	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → ((exp‘𝐴) − (exp‘-𝐴)) ∈ ℂ)
39	38	halfcld 12457	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (((exp‘𝐴) − (exp‘-𝐴)) / 2) ∈ ℂ)
40		mulneg12 11652	. . . . . . 7 ⊢ (((1 / i) ∈ ℂ ∧ (((exp‘𝐴) − (exp‘-𝐴)) / 2) ∈ ℂ) → (-(1 / i) · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) = ((1 / i) · -(((exp‘𝐴) − (exp‘-𝐴)) / 2)))
41	33, 39, 40	sylancr 588	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (-(1 / i) · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) = ((1 / i) · -(((exp‘𝐴) − (exp‘-𝐴)) / 2)))
42		2cnd 12290	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → 2 ∈ ℂ)
43		2ne0 12316	. . . . . . . . . . 11 ⊢ 2 ≠ 0
44	43	a1i 11	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → 2 ≠ 0)
45	38, 42, 44	divnegd 12003	. . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → -(((exp‘𝐴) − (exp‘-𝐴)) / 2) = (-((exp‘𝐴) − (exp‘-𝐴)) / 2))
46	34, 37	negsubdi2d 11587	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → -((exp‘𝐴) − (exp‘-𝐴)) = ((exp‘-𝐴) − (exp‘𝐴)))
47	46	oveq1d 7424	. . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → (-((exp‘𝐴) − (exp‘-𝐴)) / 2) = (((exp‘-𝐴) − (exp‘𝐴)) / 2))
48	45, 47	eqtrd 2773	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → -(((exp‘𝐴) − (exp‘-𝐴)) / 2) = (((exp‘-𝐴) − (exp‘𝐴)) / 2))
49	48	oveq2d 7425	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → ((1 / i) · -(((exp‘𝐴) − (exp‘-𝐴)) / 2)) = ((1 / i) · (((exp‘-𝐴) − (exp‘𝐴)) / 2)))
50	37, 34	subcld 11571	. . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → ((exp‘-𝐴) − (exp‘𝐴)) ∈ ℂ)
51	50	halfcld 12457	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (((exp‘-𝐴) − (exp‘𝐴)) / 2) ∈ ℂ)
52	3	a1i 11	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → i ∈ ℂ)
53	32	a1i 11	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → i ≠ 0)
54	51, 52, 53	divrec2d 11994	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → ((((exp‘-𝐴) − (exp‘𝐴)) / 2) / i) = ((1 / i) · (((exp‘-𝐴) − (exp‘𝐴)) / 2)))
55	50, 42, 52, 44, 53	divdiv1d 12021	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → ((((exp‘-𝐴) − (exp‘𝐴)) / 2) / i) = (((exp‘-𝐴) − (exp‘𝐴)) / (2 · i)))
56	49, 54, 55	3eqtr2d 2779	. . . . . 6 ⊢ (𝐴 ∈ ℂ → ((1 / i) · -(((exp‘𝐴) − (exp‘-𝐴)) / 2)) = (((exp‘-𝐴) − (exp‘𝐴)) / (2 · i)))
57	41, 56	eqtrd 2773	. . . . 5 ⊢ (𝐴 ∈ ℂ → (-(1 / i) · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) = (((exp‘-𝐴) − (exp‘𝐴)) / (2 · i)))
58	31, 57	eqtr3id 2787	. . . 4 ⊢ (𝐴 ∈ ℂ → (i · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) = (((exp‘-𝐴) − (exp‘𝐴)) / (2 · i)))
59	22, 26, 58	3eqtr4d 2783	. . 3 ⊢ (𝐴 ∈ ℂ → (sin‘(i · 𝐴)) = (i · (((exp‘𝐴) − (exp‘-𝐴)) / 2)))
60	59	oveq1d 7424	. 2 ⊢ (𝐴 ∈ ℂ → ((sin‘(i · 𝐴)) / i) = ((i · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) / i))
61	39, 52, 53	divcan3d 11995	. 2 ⊢ (𝐴 ∈ ℂ → ((i · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) / i) = (((exp‘𝐴) − (exp‘-𝐴)) / 2))
62	60, 61	eqtrd 2773	1 ⊢ (𝐴 ∈ ℂ → ((sin‘(i · 𝐴)) / i) = (((exp‘𝐴) − (exp‘-𝐴)) / 2))

Colors of variables: wff setvar class

Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 ‘cfv 6544 (class class class)co 7409 ℂcc 11108 0cc0 11110 1c1 11111 ici 11112 · cmul 11115 − cmin 11444 -cneg 11445 / cdiv 11871 2c2 12267 expce 16005 sincsin 16007

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-inf2 9636 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-er 8703 df-pm 8823 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-sup 9437 df-inf 9438 df-oi 9505 df-card 9934 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-n0 12473 df-z 12559 df-uz 12823 df-rp 12975 df-ico 13330 df-fz 13485 df-fzo 13628 df-fl 13757 df-seq 13967 df-exp 14028 df-fac 14234 df-hash 14291 df-shft 15014 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-limsup 15415 df-clim 15432 df-rlim 15433 df-sum 15633 df-ef 16011 df-sin 16013

This theorem is referenced by: resinhcl 16099 tanhlt1 16103 sinhpcosh 47785

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