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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 50773 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (sinh‘𝐴) = ((sin‘(i · 𝐴)) / i)) | |
| 2 | sinhval 16302 | . . . . 5 ⊢ (𝐴 ∈ ℂ → ((sin‘(i · 𝐴)) / i) = (((exp‘𝐴) − (exp‘-𝐴)) / 2)) | |
| 3 | 1, 2 | eqtrd 2796 | . . . 4 ⊢ (𝐴 ∈ ℂ → (sinh‘𝐴) = (((exp‘𝐴) − (exp‘-𝐴)) / 2)) |
| 4 | coshval-named 50774 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (cosh‘𝐴) = (cos‘(i · 𝐴))) | |
| 5 | coshval 16303 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (cos‘(i · 𝐴)) = (((exp‘𝐴) + (exp‘-𝐴)) / 2)) | |
| 6 | 4, 5 | eqtrd 2796 | . . . 4 ⊢ (𝐴 ∈ ℂ → (cosh‘𝐴) = (((exp‘𝐴) + (exp‘-𝐴)) / 2)) |
| 7 | 3, 6 | oveq12d 7430 | . . 3 ⊢ (𝐴 ∈ ℂ → ((sinh‘𝐴) + (cosh‘𝐴)) = ((((exp‘𝐴) − (exp‘-𝐴)) / 2) + (((exp‘𝐴) + (exp‘-𝐴)) / 2))) |
| 8 | 2cn 12399 | . . . 4 ⊢ 2 ∈ ℂ | |
| 9 | 2ne0 12430 | . . . 4 ⊢ 2 ≠ 0 | |
| 10 | efcl 16228 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → (exp‘𝐴) ∈ ℂ) | |
| 11 | negcl 11538 | . . . . . . . 8 ⊢ (𝐴 ∈ ℂ → -𝐴 ∈ ℂ) | |
| 12 | efcl 16228 | . . . . . . . 8 ⊢ (-𝐴 ∈ ℂ → (exp‘-𝐴) ∈ ℂ) | |
| 13 | 11, 12 | syl 18 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → (exp‘-𝐴) ∈ ℂ) |
| 14 | 10, 13 | addcld 11309 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → ((exp‘𝐴) + (exp‘-𝐴)) ∈ ℂ) |
| 15 | 10, 13 | subcld 11650 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → ((exp‘𝐴) − (exp‘-𝐴)) ∈ ℂ) |
| 16 | divdir 11980 | . . . . . . 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 1446 | . . . 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 12570 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (2 · (exp‘𝐴)) = ((exp‘𝐴) + (exp‘𝐴))) |
| 22 | 10, 13, 10 | nppcand 11675 | . . . . 5 ⊢ (𝐴 ∈ ℂ → ((((exp‘𝐴) − (exp‘-𝐴)) + (exp‘𝐴)) + (exp‘-𝐴)) = ((exp‘𝐴) + (exp‘𝐴))) |
| 23 | 15, 10, 13 | addassd 11312 | . . . . 5 ⊢ (𝐴 ∈ ℂ → ((((exp‘𝐴) − (exp‘-𝐴)) + (exp‘𝐴)) + (exp‘-𝐴)) = (((exp‘𝐴) − (exp‘-𝐴)) + ((exp‘𝐴) + (exp‘-𝐴)))) |
| 24 | 21, 22, 23 | 3eqtr2rd 2803 | . . . 4 ⊢ (𝐴 ∈ ℂ → (((exp‘𝐴) − (exp‘-𝐴)) + ((exp‘𝐴) + (exp‘-𝐴))) = (2 · (exp‘𝐴))) |
| 25 | 24 | oveq1d 7427 | . . 3 ⊢ (𝐴 ∈ ℂ → ((((exp‘𝐴) − (exp‘-𝐴)) + ((exp‘𝐴) + (exp‘-𝐴))) / 2) = ((2 · (exp‘𝐴)) / 2)) |
| 26 | 7, 20, 25 | 3eqtr2d 2802 | . 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 12079 | . 2 ⊢ (𝐴 ∈ ℂ → ((2 · (exp‘𝐴)) / 2) = (exp‘𝐴)) |
| 30 | 26, 29 | eqtrd 2796 | 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 2145 ≠ wne 2956 ‘cfv 6531 (class class class)co 7412 ℂcc 11179 0cc0 11181 ici 11183 + caddc 11184 · cmul 11186 − cmin 11522 -cneg 11523 / cdiv 11954 2c2 12378 expce 16207 sincsin 16209 cosccos 16210 sinhcsinh 50767 coshccosh 50768 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-inf2 9626 ax-cnex 11237 ax-resscn 11238 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-addrcl 11242 ax-mulcl 11243 ax-mulrcl 11244 ax-mulcom 11245 ax-addass 11246 ax-mulass 11247 ax-distr 11248 ax-i2m1 11249 ax-1ne0 11250 ax-1rid 11251 ax-rnegex 11252 ax-rrecex 11253 ax-cnre 11254 ax-pre-lttri 11255 ax-pre-lttrn 11256 ax-pre-ltadd 11257 ax-pre-mulgt0 11258 ax-pre-sup 11259 |
| 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 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-isom 6540 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7867 df-1st 7990 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8460 df-er 8701 df-pm 8834 df-en 8958 df-dom 8959 df-sdom 8960 df-fin 8961 df-sup 9418 df-inf 9419 df-oi 9488 df-card 10001 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11524 df-neg 11525 df-div 11955 df-nn 12317 df-2 12386 df-3 12387 df-n0 12588 df-z 12675 df-uz 12947 df-rp 13102 df-ico 13463 df-fz 13621 df-fzo 13769 df-fl 13912 df-seq 14125 df-exp 14185 df-fac 14398 df-hash 14455 df-shft 15200 df-cj 15246 df-re 15247 df-im 15248 df-sqrt 15382 df-abs 15383 df-limsup 15618 df-clim 15635 df-rlim 15636 df-sum 15834 df-ef 16213 df-sin 16215 df-cos 16216 df-sinh 50770 df-cosh 50771 |
| This theorem is used by: (None) |
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