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Theorem sinhval 16099

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 11845	. . . . . . . . 9 ⊢ (i · i) = -1
2	1	oveq1i 7421	. . . . . . . 8 ⊢ ((i · i) · 𝐴) = (-1 · 𝐴)
3		ax-icn 11171	. . . . . . . . 9 ⊢ i ∈ ℂ
4		mulass 11200	. . . . . . . . 9 ⊢ ((i ∈ ℂ ∧ i ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((i · i) · 𝐴) = (i · (i · 𝐴)))
5	3, 3, 4	mp3an12 1451	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → ((i · i) · 𝐴) = (i · (i · 𝐴)))
6		mulm1 11657	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (-1 · 𝐴) = -𝐴)
7	2, 5, 6	3eqtr3a 2796	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (i · (i · 𝐴)) = -𝐴)
8	7	fveq2d 6895	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (i · 𝐴))) = (exp‘-𝐴))
9	3, 3	mulneg1i 11662	. . . . . . . . . 10 ⊢ (-i · i) = -(i · i)
10	1	negeqi 11455	. . . . . . . . . . 11 ⊢ -(i · i) = --1
11		negneg1e1 12332	. . . . . . . . . . 11 ⊢ --1 = 1
12	10, 11	eqtri 2760	. . . . . . . . . 10 ⊢ -(i · i) = 1
13	9, 12	eqtri 2760	. . . . . . . . 9 ⊢ (-i · i) = 1
14	13	oveq1i 7421	. . . . . . . 8 ⊢ ((-i · i) · 𝐴) = (1 · 𝐴)
15		negicn 11463	. . . . . . . . 9 ⊢ -i ∈ ℂ
16		mulass 11200	. . . . . . . . 9 ⊢ ((-i ∈ ℂ ∧ i ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((-i · i) · 𝐴) = (-i · (i · 𝐴)))
17	15, 3, 16	mp3an12 1451	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → ((-i · i) · 𝐴) = (-i · (i · 𝐴)))
18		mullid 11215	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴)
19	14, 17, 18	3eqtr3a 2796	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (-i · (i · 𝐴)) = 𝐴)
20	19	fveq2d 6895	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (exp‘(-i · (i · 𝐴))) = (exp‘𝐴))
21	8, 20	oveq12d 7429	. . . . 5 ⊢ (𝐴 ∈ ℂ → ((exp‘(i · (i · 𝐴))) − (exp‘(-i · (i · 𝐴)))) = ((exp‘-𝐴) − (exp‘𝐴)))
22	21	oveq1d 7426	. . . 4 ⊢ (𝐴 ∈ ℂ → (((exp‘(i · (i · 𝐴))) − (exp‘(-i · (i · 𝐴)))) / (2 · i)) = (((exp‘-𝐴) − (exp‘𝐴)) / (2 · i)))
23		mulcl 11196	. . . . . 6 ⊢ ((i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (i · 𝐴) ∈ ℂ)
24	3, 23	mpan 688	. . . . 5 ⊢ (𝐴 ∈ ℂ → (i · 𝐴) ∈ ℂ)
25		sinval 16067	. . . . 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 14167	. . . . . . . 8 ⊢ (1 / i) = -i
28	27	negeqi 11455	. . . . . . 7 ⊢ -(1 / i) = --i
29	3	negnegi 11532	. . . . . . 7 ⊢ --i = i
30	28, 29	eqtri 2760	. . . . . 6 ⊢ -(1 / i) = i
31	30	oveq1i 7421	. . . . 5 ⊢ (-(1 / i) · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) = (i · (((exp‘𝐴) − (exp‘-𝐴)) / 2))
32		ine0 11651	. . . . . . . 8 ⊢ i ≠ 0
33	3, 32	reccli 11946	. . . . . . 7 ⊢ (1 / i) ∈ ℂ
34		efcl 16028	. . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → (exp‘𝐴) ∈ ℂ)
35		negcl 11462	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → -𝐴 ∈ ℂ)
36		efcl 16028	. . . . . . . . . 10 ⊢ (-𝐴 ∈ ℂ → (exp‘-𝐴) ∈ ℂ)
37	35, 36	syl 17	. . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → (exp‘-𝐴) ∈ ℂ)
38	34, 37	subcld 11573	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → ((exp‘𝐴) − (exp‘-𝐴)) ∈ ℂ)
39	38	halfcld 12459	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (((exp‘𝐴) − (exp‘-𝐴)) / 2) ∈ ℂ)
40		mulneg12 11654	. . . . . . 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 587	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (-(1 / i) · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) = ((1 / i) · -(((exp‘𝐴) − (exp‘-𝐴)) / 2)))
42		2cnd 12292	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → 2 ∈ ℂ)
43		2ne0 12318	. . . . . . . . . . 11 ⊢ 2 ≠ 0
44	43	a1i 11	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → 2 ≠ 0)
45	38, 42, 44	divnegd 12005	. . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → -(((exp‘𝐴) − (exp‘-𝐴)) / 2) = (-((exp‘𝐴) − (exp‘-𝐴)) / 2))
46	34, 37	negsubdi2d 11589	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → -((exp‘𝐴) − (exp‘-𝐴)) = ((exp‘-𝐴) − (exp‘𝐴)))
47	46	oveq1d 7426	. . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → (-((exp‘𝐴) − (exp‘-𝐴)) / 2) = (((exp‘-𝐴) − (exp‘𝐴)) / 2))
48	45, 47	eqtrd 2772	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → -(((exp‘𝐴) − (exp‘-𝐴)) / 2) = (((exp‘-𝐴) − (exp‘𝐴)) / 2))
49	48	oveq2d 7427	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → ((1 / i) · -(((exp‘𝐴) − (exp‘-𝐴)) / 2)) = ((1 / i) · (((exp‘-𝐴) − (exp‘𝐴)) / 2)))
50	37, 34	subcld 11573	. . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → ((exp‘-𝐴) − (exp‘𝐴)) ∈ ℂ)
51	50	halfcld 12459	. . . . . . . 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 11996	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → ((((exp‘-𝐴) − (exp‘𝐴)) / 2) / i) = ((1 / i) · (((exp‘-𝐴) − (exp‘𝐴)) / 2)))
55	50, 42, 52, 44, 53	divdiv1d 12023	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → ((((exp‘-𝐴) − (exp‘𝐴)) / 2) / i) = (((exp‘-𝐴) − (exp‘𝐴)) / (2 · i)))
56	49, 54, 55	3eqtr2d 2778	. . . . . 6 ⊢ (𝐴 ∈ ℂ → ((1 / i) · -(((exp‘𝐴) − (exp‘-𝐴)) / 2)) = (((exp‘-𝐴) − (exp‘𝐴)) / (2 · i)))
57	41, 56	eqtrd 2772	. . . . 5 ⊢ (𝐴 ∈ ℂ → (-(1 / i) · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) = (((exp‘-𝐴) − (exp‘𝐴)) / (2 · i)))
58	31, 57	eqtr3id 2786	. . . 4 ⊢ (𝐴 ∈ ℂ → (i · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) = (((exp‘-𝐴) − (exp‘𝐴)) / (2 · i)))
59	22, 26, 58	3eqtr4d 2782	. . 3 ⊢ (𝐴 ∈ ℂ → (sin‘(i · 𝐴)) = (i · (((exp‘𝐴) − (exp‘-𝐴)) / 2)))
60	59	oveq1d 7426	. 2 ⊢ (𝐴 ∈ ℂ → ((sin‘(i · 𝐴)) / i) = ((i · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) / i))
61	39, 52, 53	divcan3d 11997	. 2 ⊢ (𝐴 ∈ ℂ → ((i · (((exp‘𝐴) − (exp‘-𝐴)) / 2)) / i) = (((exp‘𝐴) − (exp‘-𝐴)) / 2))
62	60, 61	eqtrd 2772	1 ⊢ (𝐴 ∈ ℂ → ((sin‘(i · 𝐴)) / i) = (((exp‘𝐴) − (exp‘-𝐴)) / 2))

Colors of variables: wff setvar class

Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 ‘cfv 6543 (class class class)co 7411 ℂcc 11110 0cc0 11112 1c1 11113 ici 11114 · cmul 11117 − cmin 11446 -cneg 11447 / cdiv 11873 2c2 12269 expce 16007 sincsin 16009

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7727 ax-inf2 9638 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-1st 7977 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-er 8705 df-pm 8825 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-sup 9439 df-inf 9440 df-oi 9507 df-card 9936 df-pnf 11252 df-mnf 11253 df-xr 11254 df-ltxr 11255 df-le 11256 df-sub 11448 df-neg 11449 df-div 11874 df-nn 12215 df-2 12277 df-3 12278 df-n0 12475 df-z 12561 df-uz 12825 df-rp 12977 df-ico 13332 df-fz 13487 df-fzo 13630 df-fl 13759 df-seq 13969 df-exp 14030 df-fac 14236 df-hash 14293 df-shft 15016 df-cj 15048 df-re 15049 df-im 15050 df-sqrt 15184 df-abs 15185 df-limsup 15417 df-clim 15434 df-rlim 15435 df-sum 15635 df-ef 16013 df-sin 16015

This theorem is referenced by: resinhcl 16101 tanhlt1 16105 sinhpcosh 47863

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