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| Mirrors > Home > ILE Home > Th. List > efimpi | GIF version | ||
| Description: The exponential function at i times a real number less π. (Contributed by Paul Chapman, 15-Mar-2008.) |
| Ref | Expression |
|---|---|
| efimpi | ⊢ (𝐴 ∈ ℂ → (exp‘(i · (𝐴 − π))) = -(exp‘(i · 𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | picn 16014 | . . . . 5 ⊢ π ∈ ℂ | |
| 2 | subcl 8532 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ π ∈ ℂ) → (𝐴 − π) ∈ ℂ) | |
| 3 | 1, 2 | mpan2 429 | . . . 4 ⊢ (𝐴 ∈ ℂ → (𝐴 − π) ∈ ℂ) |
| 4 | efival 12524 | . . . 4 ⊢ ((𝐴 − π) ∈ ℂ → (exp‘(i · (𝐴 − π))) = ((cos‘(𝐴 − π)) + (i · (sin‘(𝐴 − π))))) | |
| 5 | 3, 4 | syl 14 | . . 3 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (𝐴 − π))) = ((cos‘(𝐴 − π)) + (i · (sin‘(𝐴 − π))))) |
| 6 | coscl 12499 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (cos‘𝐴) ∈ ℂ) | |
| 7 | ax-icn 8280 | . . . . . 6 ⊢ i ∈ ℂ | |
| 8 | sincl 12498 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (sin‘𝐴) ∈ ℂ) | |
| 9 | mulcl 8312 | . . . . . 6 ⊢ ((i ∈ ℂ ∧ (sin‘𝐴) ∈ ℂ) → (i · (sin‘𝐴)) ∈ ℂ) | |
| 10 | 7, 8, 9 | sylancr 418 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (i · (sin‘𝐴)) ∈ ℂ) |
| 11 | 6, 10 | negdid 8657 | . . . 4 ⊢ (𝐴 ∈ ℂ → -((cos‘𝐴) + (i · (sin‘𝐴))) = ( -(cos‘𝐴) + -(i · (sin‘𝐴)))) |
| 12 | cosmpi 16043 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (cos‘(𝐴 − π)) = -(cos‘𝐴)) | |
| 13 | sinmpi 16042 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → (sin‘(𝐴 − π)) = -(sin‘𝐴)) | |
| 14 | 13 | oveq2d 6104 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (i · (sin‘(𝐴 − π))) = (i · -(sin‘𝐴))) |
| 15 | mulneg2 8730 | . . . . . . 7 ⊢ ((i ∈ ℂ ∧ (sin‘𝐴) ∈ ℂ) → (i · -(sin‘𝐴)) = -(i · (sin‘𝐴))) | |
| 16 | 7, 8, 15 | sylancr 418 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (i · -(sin‘𝐴)) = -(i · (sin‘𝐴))) |
| 17 | 14, 16 | eqtrd 2271 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (i · (sin‘(𝐴 − π))) = -(i · (sin‘𝐴))) |
| 18 | 12, 17 | oveq12d 6106 | . . . 4 ⊢ (𝐴 ∈ ℂ → ((cos‘(𝐴 − π)) + (i · (sin‘(𝐴 − π)))) = ( -(cos‘𝐴) + -(i · (sin‘𝐴)))) |
| 19 | 11, 18 | eqtr4d 2274 | . . 3 ⊢ (𝐴 ∈ ℂ → -((cos‘𝐴) + (i · (sin‘𝐴))) = ((cos‘(𝐴 − π)) + (i · (sin‘(𝐴 − π))))) |
| 20 | 5, 19 | eqtr4d 2274 | . 2 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (𝐴 − π))) = -((cos‘𝐴) + (i · (sin‘𝐴)))) |
| 21 | efival 12524 | . . 3 ⊢ (𝐴 ∈ ℂ → (exp‘(i · 𝐴)) = ((cos‘𝐴) + (i · (sin‘𝐴)))) | |
| 22 | 21 | negeqd 8528 | . 2 ⊢ (𝐴 ∈ ℂ → -(exp‘(i · 𝐴)) = -((cos‘𝐴) + (i · (sin‘𝐴)))) |
| 23 | 20, 22 | eqtr4d 2274 | 1 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (𝐴 − π))) = -(exp‘(i · 𝐴))) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ∈ wcel 2209 ‘cfv 5380 (class class class)co 6088 ℂcc 8183 ici 8187 + caddc 8188 · cmul 8190 − cmin 8504 -cneg 8505 expce 12434 sincsin 12436 cosccos 12437 πcpi 12439 |
| This proof depends on 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 4248 ax-sep 4251 ax-nul 4261 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-iinf 4737 ax-cnex 8276 ax-resscn 8277 ax-1cn 8278 ax-1re 8279 ax-icn 8280 ax-addcl 8281 ax-addrcl 8282 ax-mulcl 8283 ax-mulrcl 8284 ax-addcom 8285 ax-mulcom 8286 ax-addass 8287 ax-mulass 8288 ax-distr 8289 ax-i2m1 8290 ax-0lt1 8291 ax-1rid 8292 ax-0id 8293 ax-rnegex 8294 ax-precex 8295 ax-cnre 8296 ax-pre-ltirr 8297 ax-pre-ltwlin 8298 ax-pre-lttrn 8299 ax-pre-apti 8300 ax-pre-ltadd 8301 ax-pre-mulgt0 8302 ax-pre-mulext 8303 ax-arch 8304 ax-caucvg 8305 ax-pre-suploc 8306 ax-addf 8307 ax-mulf 8308 |
| This proof 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 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-iun 4014 df-disj 4107 df-br 4132 df-opab 4194 df-mpt 4195 df-tr 4232 df-id 4440 df-po 4443 df-iso 4444 df-iord 4513 df-on 4515 df-ilim 4516 df-suc 4518 df-iom 4740 df-xp 4782 df-rel 4783 df-cnv 4784 df-co 4785 df-dm 4786 df-rn 4787 df-res 4788 df-ima 4789 df-iota 5340 df-fun 5382 df-fn 5383 df-f 5384 df-f1 5385 df-fo 5386 df-f1o 5387 df-fv 5388 df-isom 5389 df-riota 6041 df-ov 6091 df-oprab 6092 df-mpo 6093 df-of 6305 df-1st 6378 df-2nd 6379 df-recs 6580 df-irdg 6645 df-frec 6666 df-1o 6691 df-oadd 6695 df-er 6811 df-map 6928 df-pm 6929 df-en 7027 df-dom 7028 df-fin 7029 df-sup 7330 df-inf 7331 df-pnf 8368 df-mnf 8369 df-xr 8370 df-ltxr 8371 df-le 8372 df-sub 8506 df-neg 8507 df-reap 8911 df-ap 8918 df-div 9011 df-inn 9314 df-2 9372 df-3 9373 df-4 9374 df-5 9375 df-6 9376 df-7 9377 df-8 9378 df-9 9379 df-n0 9575 df-z 9656 df-uz 9938 df-q 10036 df-rp 10072 df-xneg 10191 df-xadd 10192 df-ioo 10311 df-ioc 10312 df-ico 10313 df-icc 10314 df-fz 10429 df-fzo 10567 df-seqfrec 10906 df-exp 10997 df-fac 11186 df-bc 11208 df-ihash 11237 df-shft 11602 df-cj 11629 df-re 11630 df-im 11631 df-rsqrt 11786 df-abs 11787 df-clim 12070 df-sumdc 12145 df-ef 12440 df-sin 12442 df-cos 12443 df-pi 12445 df-rest 13654 df-topgen 13673 df-psmet 14989 df-xmet 14990 df-met 14991 df-bl 14992 df-mopn 14993 df-top 15224 df-topon 15237 df-bases 15269 df-ntr 15322 df-cn 15414 df-cnp 15415 df-tx 15479 df-cncf 15797 df-limced 15882 df-dvap 15883 |
| This theorem is used by: (None) |
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