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| Mirrors > Home > ILE Home > Th. List > sinppi | GIF version | ||
| Description: Sine of a number plus π. (Contributed by NM, 10-Aug-2008.) |
| Ref | Expression |
|---|---|
| sinppi | ⊢ (𝐴 ∈ ℂ → (sin‘(𝐴 + π)) = -(sin‘𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | picn 15871 | . . 3 ⊢ π ∈ ℂ | |
| 2 | sinadd 12486 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ π ∈ ℂ) → (sin‘(𝐴 + π)) = (((sin‘𝐴) · (cos‘π)) + ((cos‘𝐴) · (sin‘π)))) | |
| 3 | 1, 2 | mpan2 429 | . 2 ⊢ (𝐴 ∈ ℂ → (sin‘(𝐴 + π)) = (((sin‘𝐴) · (cos‘π)) + ((cos‘𝐴) · (sin‘π)))) |
| 4 | cospi 15884 | . . . . . 6 ⊢ (cos‘π) = -1 | |
| 5 | 4 | oveq2i 6090 | . . . . 5 ⊢ ((sin‘𝐴) · (cos‘π)) = ((sin‘𝐴) · -1) |
| 6 | sincl 12456 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (sin‘𝐴) ∈ ℂ) | |
| 7 | neg1cn 9392 | . . . . . . . 8 ⊢ -1 ∈ ℂ | |
| 8 | mulcom 8302 | . . . . . . . 8 ⊢ (((sin‘𝐴) ∈ ℂ ∧ -1 ∈ ℂ) → ((sin‘𝐴) · -1) = (-1 · (sin‘𝐴))) | |
| 9 | 7, 8 | mpan2 429 | . . . . . . 7 ⊢ ((sin‘𝐴) ∈ ℂ → ((sin‘𝐴) · -1) = (-1 · (sin‘𝐴))) |
| 10 | mulm1 8721 | . . . . . . 7 ⊢ ((sin‘𝐴) ∈ ℂ → (-1 · (sin‘𝐴)) = -(sin‘𝐴)) | |
| 11 | 9, 10 | eqtrd 2271 | . . . . . 6 ⊢ ((sin‘𝐴) ∈ ℂ → ((sin‘𝐴) · -1) = -(sin‘𝐴)) |
| 12 | 6, 11 | syl 14 | . . . . 5 ⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) · -1) = -(sin‘𝐴)) |
| 13 | 5, 12 | eqtrid 2283 | . . . 4 ⊢ (𝐴 ∈ ℂ → ((sin‘𝐴) · (cos‘π)) = -(sin‘𝐴)) |
| 14 | sinpi 15869 | . . . . . 6 ⊢ (sin‘π) = 0 | |
| 15 | 14 | oveq2i 6090 | . . . . 5 ⊢ ((cos‘𝐴) · (sin‘π)) = ((cos‘𝐴) · 0) |
| 16 | coscl 12457 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (cos‘𝐴) ∈ ℂ) | |
| 17 | 16 | mul01d 8714 | . . . . 5 ⊢ (𝐴 ∈ ℂ → ((cos‘𝐴) · 0) = 0) |
| 18 | 15, 17 | eqtrid 2283 | . . . 4 ⊢ (𝐴 ∈ ℂ → ((cos‘𝐴) · (sin‘π)) = 0) |
| 19 | 13, 18 | oveq12d 6097 | . . 3 ⊢ (𝐴 ∈ ℂ → (((sin‘𝐴) · (cos‘π)) + ((cos‘𝐴) · (sin‘π))) = (-(sin‘𝐴) + 0)) |
| 20 | 6 | negcld 8618 | . . . 4 ⊢ (𝐴 ∈ ℂ → -(sin‘𝐴) ∈ ℂ) |
| 21 | 20 | addridd 8469 | . . 3 ⊢ (𝐴 ∈ ℂ → (-(sin‘𝐴) + 0) = -(sin‘𝐴)) |
| 22 | 19, 21 | eqtrd 2271 | . 2 ⊢ (𝐴 ∈ ℂ → (((sin‘𝐴) · (cos‘π)) + ((cos‘𝐴) · (sin‘π))) = -(sin‘𝐴)) |
| 23 | 3, 22 | eqtrd 2271 | 1 ⊢ (𝐴 ∈ ℂ → (sin‘(𝐴 + π)) = -(sin‘𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1402 ∈ wcel 2209 ‘cfv 5375 (class class class)co 6079 ℂcc 8171 0cc0 8173 1c1 8174 + caddc 8176 · cmul 8178 -cneg 8492 sincsin 12394 cosccos 12395 πcpi 12397 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4244 ax-sep 4247 ax-nul 4257 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 ax-iinf 4733 ax-cnex 8264 ax-resscn 8265 ax-1cn 8266 ax-1re 8267 ax-icn 8268 ax-addcl 8269 ax-addrcl 8270 ax-mulcl 8271 ax-mulrcl 8272 ax-addcom 8273 ax-mulcom 8274 ax-addass 8275 ax-mulass 8276 ax-distr 8277 ax-i2m1 8278 ax-0lt1 8279 ax-1rid 8280 ax-0id 8281 ax-rnegex 8282 ax-precex 8283 ax-cnre 8284 ax-pre-ltirr 8285 ax-pre-ltwlin 8286 ax-pre-lttrn 8287 ax-pre-apti 8288 ax-pre-ltadd 8289 ax-pre-mulgt0 8290 ax-pre-mulext 8291 ax-arch 8292 ax-caucvg 8293 ax-pre-suploc 8294 ax-addf 8295 ax-mulf 8296 |
| This theorem depends on definitions: df-bi 117 df-stab 843 df-dc 847 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rmo 2536 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-if 3639 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-int 3969 df-iun 4012 df-disj 4105 df-br 4129 df-opab 4191 df-mpt 4192 df-tr 4228 df-id 4436 df-po 4439 df-iso 4440 df-iord 4509 df-on 4511 df-ilim 4512 df-suc 4514 df-iom 4736 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-rn 4783 df-res 4784 df-ima 4785 df-iota 5335 df-fun 5377 df-fn 5378 df-f 5379 df-f1 5380 df-fo 5381 df-f1o 5382 df-fv 5383 df-isom 5384 df-riota 6032 df-ov 6082 df-oprab 6083 df-mpo 6084 df-of 6296 df-1st 6368 df-2nd 6369 df-recs 6570 df-irdg 6635 df-frec 6656 df-1o 6681 df-oadd 6685 df-er 6801 df-map 6918 df-pm 6919 df-en 7017 df-dom 7018 df-fin 7019 df-sup 7318 df-inf 7319 df-pnf 8356 df-mnf 8357 df-xr 8358 df-ltxr 8359 df-le 8360 df-sub 8493 df-neg 8494 df-reap 8897 df-ap 8904 df-div 8997 df-inn 9288 df-2 9346 df-3 9347 df-4 9348 df-5 9349 df-6 9350 df-7 9351 df-8 9352 df-9 9353 df-n0 9547 df-z 9628 df-uz 9905 df-q 10003 df-rp 10038 df-xneg 10157 df-xadd 10158 df-ioo 10277 df-ioc 10278 df-ico 10279 df-icc 10280 df-fz 10395 df-fzo 10533 df-seqfrec 10868 df-exp 10959 df-fac 11147 df-bc 11169 df-ihash 11198 df-shft 11563 df-cj 11590 df-re 11591 df-im 11592 df-rsqrt 11747 df-abs 11748 df-clim 12028 df-sumdc 12103 df-ef 12398 df-sin 12400 df-cos 12401 df-pi 12403 df-rest 13578 df-topgen 13597 df-psmet 14863 df-xmet 14864 df-met 14865 df-bl 14866 df-mopn 14867 df-top 15082 df-topon 15095 df-bases 15127 df-ntr 15180 df-cn 15272 df-cnp 15273 df-tx 15337 df-cncf 15655 df-limced 15740 df-dvap 15741 |
| This theorem is referenced by: (None) |
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