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Theorem coshval-named 48968
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.)
Assertion
Ref Expression
coshval-named (𝐴 ∈ ℂ → (cosh‘𝐴) = (cos‘(i · 𝐴)))

Proof of Theorem coshval-named
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 oveq2 7439 . . 3 (𝑥 = 𝐴 → (i · 𝑥) = (i · 𝐴))
21fveq2d 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
52, 3, 4fvmpt 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  cc 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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