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Mirrors > Home > MPE Home > Th. List > acosval | Structured version Visualization version GIF version |
Description: Value of the arccos function. (Contributed by Mario Carneiro, 31-Mar-2015.) |
Ref | Expression |
---|---|
acosval | ⊢ (𝐴 ∈ ℂ → (arccos‘𝐴) = ((π / 2) − (arcsin‘𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fveq2 6774 | . . 3 ⊢ (𝑥 = 𝐴 → (arcsin‘𝑥) = (arcsin‘𝐴)) | |
2 | 1 | oveq2d 7291 | . 2 ⊢ (𝑥 = 𝐴 → ((π / 2) − (arcsin‘𝑥)) = ((π / 2) − (arcsin‘𝐴))) |
3 | df-acos 26016 | . 2 ⊢ arccos = (𝑥 ∈ ℂ ↦ ((π / 2) − (arcsin‘𝑥))) | |
4 | ovex 7308 | . 2 ⊢ ((π / 2) − (arcsin‘𝐴)) ∈ V | |
5 | 2, 3, 4 | fvmpt 6875 | 1 ⊢ (𝐴 ∈ ℂ → (arccos‘𝐴) = ((π / 2) − (arcsin‘𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2106 ‘cfv 6433 (class class class)co 7275 ℂcc 10869 − cmin 11205 / cdiv 11632 2c2 12028 πcpi 15776 arcsincasin 26012 arccoscacos 26013 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pr 5352 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ral 3069 df-rex 3070 df-rab 3073 df-v 3434 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-iota 6391 df-fun 6435 df-fv 6441 df-ov 7278 df-acos 26016 |
This theorem is referenced by: acosneg 26037 cosacos 26040 acoscos 26043 acos1 26045 acosbnd 26050 acosrecl 26053 sinacos 26055 |
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