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| Mirrors > Home > MPE Home > Th. List > Mathboxes > sinhpcosh | Structured version Visualization version GIF version | ||
| Description: Prove that (sinh‘𝐴) + (cosh‘𝐴) = (exp‘𝐴) using the conventional hyperbolic trigonometric functions. (Contributed by David A. Wheeler, 27-May-2015.) |
| Ref | Expression |
|---|---|
| sinhpcosh | ⊢ (𝐴 ∈ ℂ → ((sinh‘𝐴) + (cosh‘𝐴)) = (exp‘𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sinhval-named 51109 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (sinh‘𝐴) = ((sin‘(i · 𝐴)) / i)) | |
| 2 | sinhval 16351 | . . . . 5 ⊢ (𝐴 ∈ ℂ → ((sin‘(i · 𝐴)) / i) = (((exp‘𝐴) − (exp‘ -𝐴)) / 2)) | |
| 3 | 1, 2 | eqtrd 2798 | . . . 4 ⊢ (𝐴 ∈ ℂ → (sinh‘𝐴) = (((exp‘𝐴) − (exp‘ -𝐴)) / 2)) |
| 4 | coshval-named 51110 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (cosh‘𝐴) = (cos‘(i · 𝐴))) | |
| 5 | coshval 16352 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (cos‘(i · 𝐴)) = (((exp‘𝐴) + (exp‘ -𝐴)) / 2)) | |
| 6 | 4, 5 | eqtrd 2798 | . . . 4 ⊢ (𝐴 ∈ ℂ → (cosh‘𝐴) = (((exp‘𝐴) + (exp‘ -𝐴)) / 2)) |
| 7 | 3, 6 | oveq12d 7461 | . . 3 ⊢ (𝐴 ∈ ℂ → ((sinh‘𝐴) + (cosh‘𝐴)) = ((((exp‘𝐴) − (exp‘ -𝐴)) / 2) + (((exp‘𝐴) + (exp‘ -𝐴)) / 2))) |
| 8 | 2cn 12445 | . . . 4 ⊢ 2 ∈ ℂ | |
| 9 | 2ne0 12476 | . . . 4 ⊢ 2 ≠ 0 | |
| 10 | efcl 16277 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → (exp‘𝐴) ∈ ℂ) | |
| 11 | negcl 11584 | . . . . . . . 8 ⊢ (𝐴 ∈ ℂ → -𝐴 ∈ ℂ) | |
| 12 | efcl 16277 | . . . . . . . 8 ⊢ ( -𝐴 ∈ ℂ → (exp‘ -𝐴) ∈ ℂ) | |
| 13 | 11, 12 | syl 18 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → (exp‘ -𝐴) ∈ ℂ) |
| 14 | 10, 13 | addcld 11355 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → ((exp‘𝐴) + (exp‘ -𝐴)) ∈ ℂ) |
| 15 | 10, 13 | subcld 11696 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → ((exp‘𝐴) − (exp‘ -𝐴)) ∈ ℂ) |
| 16 | divdir 12026 | . . . . . . 7 ⊢ ((((exp‘𝐴) − (exp‘ -𝐴)) ∈ ℂ ∧ ((exp‘𝐴) + (exp‘ -𝐴)) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → ((((exp‘𝐴) − (exp‘ -𝐴)) + ((exp‘𝐴) + (exp‘ -𝐴))) / 2) = ((((exp‘𝐴) − (exp‘ -𝐴)) / 2) + (((exp‘𝐴) + (exp‘ -𝐴)) / 2))) | |
| 17 | 15, 16 | syl3an1 1181 | . . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ ((exp‘𝐴) + (exp‘ -𝐴)) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → ((((exp‘𝐴) − (exp‘ -𝐴)) + ((exp‘𝐴) + (exp‘ -𝐴))) / 2) = ((((exp‘𝐴) − (exp‘ -𝐴)) / 2) + (((exp‘𝐴) + (exp‘ -𝐴)) / 2))) |
| 18 | 14, 17 | syl3an2 1182 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → ((((exp‘𝐴) − (exp‘ -𝐴)) + ((exp‘𝐴) + (exp‘ -𝐴))) / 2) = ((((exp‘𝐴) − (exp‘ -𝐴)) / 2) + (((exp‘𝐴) + (exp‘ -𝐴)) / 2))) |
| 19 | 18 | 3anidm12 1447 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → ((((exp‘𝐴) − (exp‘ -𝐴)) + ((exp‘𝐴) + (exp‘ -𝐴))) / 2) = ((((exp‘𝐴) − (exp‘ -𝐴)) / 2) + (((exp‘𝐴) + (exp‘ -𝐴)) / 2))) |
| 20 | 8, 9, 19 | mpanr12 718 | . . 3 ⊢ (𝐴 ∈ ℂ → ((((exp‘𝐴) − (exp‘ -𝐴)) + ((exp‘𝐴) + (exp‘ -𝐴))) / 2) = ((((exp‘𝐴) − (exp‘ -𝐴)) / 2) + (((exp‘𝐴) + (exp‘ -𝐴)) / 2))) |
| 21 | 10 | 2timesd 12616 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (2 · (exp‘𝐴)) = ((exp‘𝐴) + (exp‘𝐴))) |
| 22 | 10, 13, 10 | nppcand 11721 | . . . . 5 ⊢ (𝐴 ∈ ℂ → ((((exp‘𝐴) − (exp‘ -𝐴)) + (exp‘𝐴)) + (exp‘ -𝐴)) = ((exp‘𝐴) + (exp‘𝐴))) |
| 23 | 15, 10, 13 | addassd 11358 | . . . . 5 ⊢ (𝐴 ∈ ℂ → ((((exp‘𝐴) − (exp‘ -𝐴)) + (exp‘𝐴)) + (exp‘ -𝐴)) = (((exp‘𝐴) − (exp‘ -𝐴)) + ((exp‘𝐴) + (exp‘ -𝐴)))) |
| 24 | 21, 22, 23 | 3eqtr2rd 2805 | . . . 4 ⊢ (𝐴 ∈ ℂ → (((exp‘𝐴) − (exp‘ -𝐴)) + ((exp‘𝐴) + (exp‘ -𝐴))) = (2 · (exp‘𝐴))) |
| 25 | 24 | oveq1d 7458 | . . 3 ⊢ (𝐴 ∈ ℂ → ((((exp‘𝐴) − (exp‘ -𝐴)) + ((exp‘𝐴) + (exp‘ -𝐴))) / 2) = ((2 · (exp‘𝐴)) / 2)) |
| 26 | 7, 20, 25 | 3eqtr2d 2804 | . 2 ⊢ (𝐴 ∈ ℂ → ((sinh‘𝐴) + (cosh‘𝐴)) = ((2 · (exp‘𝐴)) / 2)) |
| 27 | 8 | a1i 11 | . . 3 ⊢ (𝐴 ∈ ℂ → 2 ∈ ℂ) |
| 28 | 9 | a1i 11 | . . 3 ⊢ (𝐴 ∈ ℂ → 2 ≠ 0) |
| 29 | 10, 27, 28 | divcan3d 12125 | . 2 ⊢ (𝐴 ∈ ℂ → ((2 · (exp‘𝐴)) / 2) = (exp‘𝐴)) |
| 30 | 26, 29 | eqtrd 2798 | 1 ⊢ (𝐴 ∈ ℂ → ((sinh‘𝐴) + (cosh‘𝐴)) = (exp‘𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2147 ≠ wne 2959 ‘cfv 6558 (class class class)co 7443 ℂcc 11225 0cc0 11227 ici 11229 + caddc 11230 · cmul 11232 − cmin 11568 -cneg 11569 / cdiv 12000 2c2 12424 expce 16256 sincsin 16258 cosccos 16259 sinhcsinh 51103 coshccosh 51104 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5235 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7775 ax-inf2 9669 ax-cnex 11283 ax-resscn 11284 ax-1cn 11285 ax-icn 11286 ax-addcl 11287 ax-addrcl 11288 ax-mulcl 11289 ax-mulrcl 11290 ax-mulcom 11291 ax-addass 11292 ax-mulass 11293 ax-distr 11294 ax-i2m1 11295 ax-1ne0 11296 ax-1rid 11297 ax-rnegex 11298 ax-rrecex 11299 ax-cnre 11300 ax-pre-lttri 11301 ax-pre-lttrn 11302 ax-pre-ltadd 11303 ax-pre-mulgt0 11304 ax-pre-sup 11305 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6322 df-ord 6383 df-on 6384 df-lim 6385 df-suc 6386 df-iota 6512 df-fun 6560 df-fn 6561 df-f 6562 df-f1 6563 df-fo 6564 df-f1o 6565 df-fv 6566 df-isom 6567 df-riota 7400 df-ov 7446 df-oprab 7447 df-mpo 7448 df-om 7902 df-1st 8025 df-2nd 8026 df-frecs 8327 df-wrecs 8358 df-recs 8407 df-rdg 8446 df-1o 8504 df-er 8745 df-pm 8878 df-en 9002 df-dom 9003 df-sdom 9004 df-fin 9005 df-sup 9461 df-inf 9462 df-oi 9531 df-card 10047 df-pnf 11372 df-mnf 11373 df-xr 11374 df-ltxr 11375 df-le 11376 df-sub 11570 df-neg 11571 df-div 12001 df-nn 12363 df-2 12432 df-3 12433 df-n0 12634 df-z 12721 df-uz 12993 df-rp 13148 df-ico 13509 df-fz 13667 df-fzo 13816 df-fl 13959 df-seq 14172 df-exp 14232 df-fac 14445 df-hash 14502 df-shft 15249 df-cj 15295 df-re 15296 df-im 15297 df-sqrt 15431 df-abs 15432 df-limsup 15667 df-clim 15684 df-rlim 15685 df-sum 15883 df-ef 16262 df-sin 16264 df-cos 16265 df-sinh 51106 df-cosh 51107 |
| This theorem is used by: (None) |
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