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Mirrors > Home > MPE Home > Th. List > efieq | Structured version Visualization version GIF version |
Description: The exponentials of two imaginary numbers are equal iff their sine and cosine components are equal. (Contributed by Paul Chapman, 15-Mar-2008.) |
Ref | Expression |
---|---|
efieq | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((exp‘(i · 𝐴)) = (exp‘(i · 𝐵)) ↔ ((cos‘𝐴) = (cos‘𝐵) ∧ (sin‘𝐴) = (sin‘𝐵)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | recn 10615 | . . 3 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
2 | recn 10615 | . . 3 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
3 | efival 15493 | . . . 4 ⊢ (𝐴 ∈ ℂ → (exp‘(i · 𝐴)) = ((cos‘𝐴) + (i · (sin‘𝐴)))) | |
4 | efival 15493 | . . . 4 ⊢ (𝐵 ∈ ℂ → (exp‘(i · 𝐵)) = ((cos‘𝐵) + (i · (sin‘𝐵)))) | |
5 | 3, 4 | eqeqan12d 2835 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((exp‘(i · 𝐴)) = (exp‘(i · 𝐵)) ↔ ((cos‘𝐴) + (i · (sin‘𝐴))) = ((cos‘𝐵) + (i · (sin‘𝐵))))) |
6 | 1, 2, 5 | syl2an 595 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((exp‘(i · 𝐴)) = (exp‘(i · 𝐵)) ↔ ((cos‘𝐴) + (i · (sin‘𝐴))) = ((cos‘𝐵) + (i · (sin‘𝐵))))) |
7 | recoscl 15482 | . . . 4 ⊢ (𝐴 ∈ ℝ → (cos‘𝐴) ∈ ℝ) | |
8 | resincl 15481 | . . . 4 ⊢ (𝐴 ∈ ℝ → (sin‘𝐴) ∈ ℝ) | |
9 | 7, 8 | jca 512 | . . 3 ⊢ (𝐴 ∈ ℝ → ((cos‘𝐴) ∈ ℝ ∧ (sin‘𝐴) ∈ ℝ)) |
10 | recoscl 15482 | . . . 4 ⊢ (𝐵 ∈ ℝ → (cos‘𝐵) ∈ ℝ) | |
11 | resincl 15481 | . . . 4 ⊢ (𝐵 ∈ ℝ → (sin‘𝐵) ∈ ℝ) | |
12 | 10, 11 | jca 512 | . . 3 ⊢ (𝐵 ∈ ℝ → ((cos‘𝐵) ∈ ℝ ∧ (sin‘𝐵) ∈ ℝ)) |
13 | cru 11618 | . . 3 ⊢ ((((cos‘𝐴) ∈ ℝ ∧ (sin‘𝐴) ∈ ℝ) ∧ ((cos‘𝐵) ∈ ℝ ∧ (sin‘𝐵) ∈ ℝ)) → (((cos‘𝐴) + (i · (sin‘𝐴))) = ((cos‘𝐵) + (i · (sin‘𝐵))) ↔ ((cos‘𝐴) = (cos‘𝐵) ∧ (sin‘𝐴) = (sin‘𝐵)))) | |
14 | 9, 12, 13 | syl2an 595 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (((cos‘𝐴) + (i · (sin‘𝐴))) = ((cos‘𝐵) + (i · (sin‘𝐵))) ↔ ((cos‘𝐴) = (cos‘𝐵) ∧ (sin‘𝐴) = (sin‘𝐵)))) |
15 | 6, 14 | bitrd 280 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((exp‘(i · 𝐴)) = (exp‘(i · 𝐵)) ↔ ((cos‘𝐴) = (cos‘𝐵) ∧ (sin‘𝐴) = (sin‘𝐵)))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 207 ∧ wa 396 = wceq 1528 ∈ wcel 2105 ‘cfv 6348 (class class class)co 7145 ℂcc 10523 ℝcr 10524 ici 10527 + caddc 10528 · cmul 10530 expce 15403 sincsin 15405 cosccos 15406 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-rep 5181 ax-sep 5194 ax-nul 5201 ax-pow 5257 ax-pr 5320 ax-un 7450 ax-inf2 9092 ax-cnex 10581 ax-resscn 10582 ax-1cn 10583 ax-icn 10584 ax-addcl 10585 ax-addrcl 10586 ax-mulcl 10587 ax-mulrcl 10588 ax-mulcom 10589 ax-addass 10590 ax-mulass 10591 ax-distr 10592 ax-i2m1 10593 ax-1ne0 10594 ax-1rid 10595 ax-rnegex 10596 ax-rrecex 10597 ax-cnre 10598 ax-pre-lttri 10599 ax-pre-lttrn 10600 ax-pre-ltadd 10601 ax-pre-mulgt0 10602 ax-pre-sup 10603 ax-addf 10604 ax-mulf 10605 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3or 1080 df-3an 1081 df-tru 1531 df-fal 1541 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ne 3014 df-nel 3121 df-ral 3140 df-rex 3141 df-reu 3142 df-rmo 3143 df-rab 3144 df-v 3494 df-sbc 3770 df-csb 3881 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-pss 3951 df-nul 4289 df-if 4464 df-pw 4537 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4831 df-int 4868 df-iun 4912 df-br 5058 df-opab 5120 df-mpt 5138 df-tr 5164 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-se 5508 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-lim 6189 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-isom 6357 df-riota 7103 df-ov 7148 df-oprab 7149 df-mpo 7150 df-om 7570 df-1st 7678 df-2nd 7679 df-wrecs 7936 df-recs 7997 df-rdg 8035 df-1o 8091 df-oadd 8095 df-er 8278 df-pm 8398 df-en 8498 df-dom 8499 df-sdom 8500 df-fin 8501 df-sup 8894 df-inf 8895 df-oi 8962 df-card 9356 df-pnf 10665 df-mnf 10666 df-xr 10667 df-ltxr 10668 df-le 10669 df-sub 10860 df-neg 10861 df-div 11286 df-nn 11627 df-2 11688 df-3 11689 df-n0 11886 df-z 11970 df-uz 12232 df-rp 12378 df-ico 12732 df-fz 12881 df-fzo 13022 df-fl 13150 df-seq 13358 df-exp 13418 df-fac 13622 df-hash 13679 df-shft 14414 df-cj 14446 df-re 14447 df-im 14448 df-sqrt 14582 df-abs 14583 df-limsup 14816 df-clim 14833 df-rlim 14834 df-sum 15031 df-ef 15409 df-sin 15411 df-cos 15412 |
This theorem is referenced by: (None) |
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