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| Mirrors > Home > MPE Home > Th. List > sinval | Structured version Visualization version GIF version | ||
| Description: Value of the sine function. (Contributed by NM, 14-Mar-2005.) (Revised by Mario Carneiro, 10-Nov-2013.) |
| Ref | Expression |
|---|---|
| sinval | ⊢ (𝐴 ∈ ℂ → (sin‘𝐴) = (((exp‘(i · 𝐴)) − (exp‘( -i · 𝐴))) / (2 · i))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oveq2 7428 | . . . . 5 ⊢ (𝑥 = 𝐴 → (i · 𝑥) = (i · 𝐴)) | |
| 2 | 1 | fveq2d 6889 | . . . 4 ⊢ (𝑥 = 𝐴 → (exp‘(i · 𝑥)) = (exp‘(i · 𝐴))) |
| 3 | oveq2 7428 | . . . . 5 ⊢ (𝑥 = 𝐴 → ( -i · 𝑥) = ( -i · 𝐴)) | |
| 4 | 3 | fveq2d 6889 | . . . 4 ⊢ (𝑥 = 𝐴 → (exp‘( -i · 𝑥)) = (exp‘( -i · 𝐴))) |
| 5 | 2, 4 | oveq12d 7438 | . . 3 ⊢ (𝑥 = 𝐴 → ((exp‘(i · 𝑥)) − (exp‘( -i · 𝑥))) = ((exp‘(i · 𝐴)) − (exp‘( -i · 𝐴)))) |
| 6 | 5 | oveq1d 7435 | . 2 ⊢ (𝑥 = 𝐴 → (((exp‘(i · 𝑥)) − (exp‘( -i · 𝑥))) / (2 · i)) = (((exp‘(i · 𝐴)) − (exp‘( -i · 𝐴))) / (2 · i))) |
| 7 | df-sin 16240 | . 2 ⊢ sin = (𝑥 ∈ ℂ ↦ (((exp‘(i · 𝑥)) − (exp‘( -i · 𝑥))) / (2 · i))) | |
| 8 | ovex 7453 | . 2 ⊢ (((exp‘(i · 𝐴)) − (exp‘( -i · 𝐴))) / (2 · i)) ∈ V | |
| 9 | 6, 7, 8 | fvmpt 6993 | 1 ⊢ (𝐴 ∈ ℂ → (sin‘𝐴) = (((exp‘(i · 𝐴)) − (exp‘( -i · 𝐴))) / (2 · i))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 ‘cfv 6538 (class class class)co 7420 ℂcc 11201 ici 11205 · cmul 11208 − cmin 11544 -cneg 11545 / cdiv 11976 2c2 12400 expce 16232 sincsin 16234 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-iota 6494 df-fun 6540 df-fv 6546 df-ov 7423 df-sin 16240 |
| This theorem is used by: tanval2 16306 resinval 16308 sinneg 16319 efival 16325 sinhval 16327 sinadd 16337 dvsincos 26306 sinper 26815 sineq0 26857 efeq1 26861 sinasin 27222 sineq0ALT 46012 |
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