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Mirrors > Home > MPE Home > Th. List > Mathboxes > coshval-named | Structured version Visualization version GIF version |
Description: Value of the named cosh function. Here we show the simple conversion to the conventional form used in set.mm, using the definition given by df-cosh 48965. See coshval 16188 for a theorem to convert this further. (Contributed by David A. Wheeler, 10-May-2015.) |
Ref | Expression |
---|---|
coshval-named | ⊢ (𝐴 ∈ ℂ → (cosh‘𝐴) = (cos‘(i · 𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq2 7439 | . . 3 ⊢ (𝑥 = 𝐴 → (i · 𝑥) = (i · 𝐴)) | |
2 | 1 | fveq2d 6911 | . 2 ⊢ (𝑥 = 𝐴 → (cos‘(i · 𝑥)) = (cos‘(i · 𝐴))) |
3 | df-cosh 48965 | . 2 ⊢ cosh = (𝑥 ∈ ℂ ↦ (cos‘(i · 𝑥))) | |
4 | fvex 6920 | . 2 ⊢ (cos‘(i · 𝐴)) ∈ V | |
5 | 2, 3, 4 | fvmpt 7016 | 1 ⊢ (𝐴 ∈ ℂ → (cosh‘𝐴) = (cos‘(i · 𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 ∈ wcel 2106 ‘cfv 6563 (class class class)co 7431 ℂcc 11151 ici 11155 · cmul 11158 cosccos 16097 coshccosh 48962 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-sep 5302 ax-nul 5312 ax-pr 5438 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-ral 3060 df-rex 3069 df-rab 3434 df-v 3480 df-dif 3966 df-un 3968 df-ss 3980 df-nul 4340 df-if 4532 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5583 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-iota 6516 df-fun 6565 df-fv 6571 df-ov 7434 df-cosh 48965 |
This theorem is referenced by: sinhpcosh 48971 |
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