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Mirrors > Home > MPE Home > Th. List > cosasin | Structured version Visualization version GIF version |
Description: The cosine of the arcsine of 𝐴 is √(1 − 𝐴↑2). (Contributed by Mario Carneiro, 2-Apr-2015.) |
Ref | Expression |
---|---|
cosasin | ⊢ (𝐴 ∈ ℂ → (cos‘(arcsin‘𝐴)) = (√‘(1 − (𝐴↑2)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | asincl 25756 | . . 3 ⊢ (𝐴 ∈ ℂ → (arcsin‘𝐴) ∈ ℂ) | |
2 | cosval 15684 | . . 3 ⊢ ((arcsin‘𝐴) ∈ ℂ → (cos‘(arcsin‘𝐴)) = (((exp‘(i · (arcsin‘𝐴))) + (exp‘(-i · (arcsin‘𝐴)))) / 2)) | |
3 | 1, 2 | syl 17 | . 2 ⊢ (𝐴 ∈ ℂ → (cos‘(arcsin‘𝐴)) = (((exp‘(i · (arcsin‘𝐴))) + (exp‘(-i · (arcsin‘𝐴)))) / 2)) |
4 | ax-1cn 10787 | . . . . . . 7 ⊢ 1 ∈ ℂ | |
5 | sqcl 13690 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → (𝐴↑2) ∈ ℂ) | |
6 | subcl 11077 | . . . . . . 7 ⊢ ((1 ∈ ℂ ∧ (𝐴↑2) ∈ ℂ) → (1 − (𝐴↑2)) ∈ ℂ) | |
7 | 4, 5, 6 | sylancr 590 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (1 − (𝐴↑2)) ∈ ℂ) |
8 | 7 | sqrtcld 15001 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (√‘(1 − (𝐴↑2))) ∈ ℂ) |
9 | ax-icn 10788 | . . . . . 6 ⊢ i ∈ ℂ | |
10 | mulcl 10813 | . . . . . 6 ⊢ ((i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (i · 𝐴) ∈ ℂ) | |
11 | 9, 10 | mpan 690 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (i · 𝐴) ∈ ℂ) |
12 | 8, 11, 8 | ppncand 11229 | . . . 4 ⊢ (𝐴 ∈ ℂ → (((√‘(1 − (𝐴↑2))) + (i · 𝐴)) + ((√‘(1 − (𝐴↑2))) − (i · 𝐴))) = ((√‘(1 − (𝐴↑2))) + (√‘(1 − (𝐴↑2))))) |
13 | efiasin 25771 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (arcsin‘𝐴))) = ((i · 𝐴) + (√‘(1 − (𝐴↑2))))) | |
14 | 11, 8, 13 | comraddd 11046 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (arcsin‘𝐴))) = ((√‘(1 − (𝐴↑2))) + (i · 𝐴))) |
15 | mulneg12 11270 | . . . . . . . . . 10 ⊢ ((i ∈ ℂ ∧ (arcsin‘𝐴) ∈ ℂ) → (-i · (arcsin‘𝐴)) = (i · -(arcsin‘𝐴))) | |
16 | 9, 1, 15 | sylancr 590 | . . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → (-i · (arcsin‘𝐴)) = (i · -(arcsin‘𝐴))) |
17 | asinneg 25769 | . . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → (arcsin‘-𝐴) = -(arcsin‘𝐴)) | |
18 | 17 | oveq2d 7229 | . . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → (i · (arcsin‘-𝐴)) = (i · -(arcsin‘𝐴))) |
19 | 16, 18 | eqtr4d 2780 | . . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (-i · (arcsin‘𝐴)) = (i · (arcsin‘-𝐴))) |
20 | 19 | fveq2d 6721 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → (exp‘(-i · (arcsin‘𝐴))) = (exp‘(i · (arcsin‘-𝐴)))) |
21 | negcl 11078 | . . . . . . . 8 ⊢ (𝐴 ∈ ℂ → -𝐴 ∈ ℂ) | |
22 | efiasin 25771 | . . . . . . . 8 ⊢ (-𝐴 ∈ ℂ → (exp‘(i · (arcsin‘-𝐴))) = ((i · -𝐴) + (√‘(1 − (-𝐴↑2))))) | |
23 | 21, 22 | syl 17 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → (exp‘(i · (arcsin‘-𝐴))) = ((i · -𝐴) + (√‘(1 − (-𝐴↑2))))) |
24 | mulneg2 11269 | . . . . . . . . 9 ⊢ ((i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (i · -𝐴) = -(i · 𝐴)) | |
25 | 9, 24 | mpan 690 | . . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (i · -𝐴) = -(i · 𝐴)) |
26 | sqneg 13688 | . . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → (-𝐴↑2) = (𝐴↑2)) | |
27 | 26 | oveq2d 7229 | . . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → (1 − (-𝐴↑2)) = (1 − (𝐴↑2))) |
28 | 27 | fveq2d 6721 | . . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (√‘(1 − (-𝐴↑2))) = (√‘(1 − (𝐴↑2)))) |
29 | 25, 28 | oveq12d 7231 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → ((i · -𝐴) + (√‘(1 − (-𝐴↑2)))) = (-(i · 𝐴) + (√‘(1 − (𝐴↑2))))) |
30 | 20, 23, 29 | 3eqtrd 2781 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (exp‘(-i · (arcsin‘𝐴))) = (-(i · 𝐴) + (√‘(1 − (𝐴↑2))))) |
31 | 11 | negcld 11176 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → -(i · 𝐴) ∈ ℂ) |
32 | 31, 8 | addcomd 11034 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (-(i · 𝐴) + (√‘(1 − (𝐴↑2)))) = ((√‘(1 − (𝐴↑2))) + -(i · 𝐴))) |
33 | 8, 11 | negsubd 11195 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → ((√‘(1 − (𝐴↑2))) + -(i · 𝐴)) = ((√‘(1 − (𝐴↑2))) − (i · 𝐴))) |
34 | 30, 32, 33 | 3eqtrd 2781 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (exp‘(-i · (arcsin‘𝐴))) = ((√‘(1 − (𝐴↑2))) − (i · 𝐴))) |
35 | 14, 34 | oveq12d 7231 | . . . 4 ⊢ (𝐴 ∈ ℂ → ((exp‘(i · (arcsin‘𝐴))) + (exp‘(-i · (arcsin‘𝐴)))) = (((√‘(1 − (𝐴↑2))) + (i · 𝐴)) + ((√‘(1 − (𝐴↑2))) − (i · 𝐴)))) |
36 | 8 | 2timesd 12073 | . . . 4 ⊢ (𝐴 ∈ ℂ → (2 · (√‘(1 − (𝐴↑2)))) = ((√‘(1 − (𝐴↑2))) + (√‘(1 − (𝐴↑2))))) |
37 | 12, 35, 36 | 3eqtr4d 2787 | . . 3 ⊢ (𝐴 ∈ ℂ → ((exp‘(i · (arcsin‘𝐴))) + (exp‘(-i · (arcsin‘𝐴)))) = (2 · (√‘(1 − (𝐴↑2))))) |
38 | 37 | oveq1d 7228 | . 2 ⊢ (𝐴 ∈ ℂ → (((exp‘(i · (arcsin‘𝐴))) + (exp‘(-i · (arcsin‘𝐴)))) / 2) = ((2 · (√‘(1 − (𝐴↑2)))) / 2)) |
39 | 2cnd 11908 | . . 3 ⊢ (𝐴 ∈ ℂ → 2 ∈ ℂ) | |
40 | 2ne0 11934 | . . . 4 ⊢ 2 ≠ 0 | |
41 | 40 | a1i 11 | . . 3 ⊢ (𝐴 ∈ ℂ → 2 ≠ 0) |
42 | 8, 39, 41 | divcan3d 11613 | . 2 ⊢ (𝐴 ∈ ℂ → ((2 · (√‘(1 − (𝐴↑2)))) / 2) = (√‘(1 − (𝐴↑2)))) |
43 | 3, 38, 42 | 3eqtrd 2781 | 1 ⊢ (𝐴 ∈ ℂ → (cos‘(arcsin‘𝐴)) = (√‘(1 − (𝐴↑2)))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1543 ∈ wcel 2110 ≠ wne 2940 ‘cfv 6380 (class class class)co 7213 ℂcc 10727 0cc0 10729 1c1 10730 ici 10731 + caddc 10732 · cmul 10734 − cmin 11062 -cneg 11063 / cdiv 11489 2c2 11885 ↑cexp 13635 √csqrt 14796 expce 15623 cosccos 15626 arcsincasin 25745 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-rep 5179 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-inf2 9256 ax-cnex 10785 ax-resscn 10786 ax-1cn 10787 ax-icn 10788 ax-addcl 10789 ax-addrcl 10790 ax-mulcl 10791 ax-mulrcl 10792 ax-mulcom 10793 ax-addass 10794 ax-mulass 10795 ax-distr 10796 ax-i2m1 10797 ax-1ne0 10798 ax-1rid 10799 ax-rnegex 10800 ax-rrecex 10801 ax-cnre 10802 ax-pre-lttri 10803 ax-pre-lttrn 10804 ax-pre-ltadd 10805 ax-pre-mulgt0 10806 ax-pre-sup 10807 ax-addf 10808 ax-mulf 10809 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rmo 3069 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-pss 3885 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-tp 4546 df-op 4548 df-uni 4820 df-int 4860 df-iun 4906 df-iin 4907 df-br 5054 df-opab 5116 df-mpt 5136 df-tr 5162 df-id 5455 df-eprel 5460 df-po 5468 df-so 5469 df-fr 5509 df-se 5510 df-we 5511 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-pred 6160 df-ord 6216 df-on 6217 df-lim 6218 df-suc 6219 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-isom 6389 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-of 7469 df-om 7645 df-1st 7761 df-2nd 7762 df-supp 7904 df-wrecs 8047 df-recs 8108 df-rdg 8146 df-1o 8202 df-2o 8203 df-er 8391 df-map 8510 df-pm 8511 df-ixp 8579 df-en 8627 df-dom 8628 df-sdom 8629 df-fin 8630 df-fsupp 8986 df-fi 9027 df-sup 9058 df-inf 9059 df-oi 9126 df-card 9555 df-pnf 10869 df-mnf 10870 df-xr 10871 df-ltxr 10872 df-le 10873 df-sub 11064 df-neg 11065 df-div 11490 df-nn 11831 df-2 11893 df-3 11894 df-4 11895 df-5 11896 df-6 11897 df-7 11898 df-8 11899 df-9 11900 df-n0 12091 df-z 12177 df-dec 12294 df-uz 12439 df-q 12545 df-rp 12587 df-xneg 12704 df-xadd 12705 df-xmul 12706 df-ioo 12939 df-ioc 12940 df-ico 12941 df-icc 12942 df-fz 13096 df-fzo 13239 df-fl 13367 df-mod 13443 df-seq 13575 df-exp 13636 df-fac 13840 df-bc 13869 df-hash 13897 df-shft 14630 df-cj 14662 df-re 14663 df-im 14664 df-sqrt 14798 df-abs 14799 df-limsup 15032 df-clim 15049 df-rlim 15050 df-sum 15250 df-ef 15629 df-sin 15631 df-cos 15632 df-pi 15634 df-struct 16700 df-sets 16717 df-slot 16735 df-ndx 16745 df-base 16761 df-ress 16785 df-plusg 16815 df-mulr 16816 df-starv 16817 df-sca 16818 df-vsca 16819 df-ip 16820 df-tset 16821 df-ple 16822 df-ds 16824 df-unif 16825 df-hom 16826 df-cco 16827 df-rest 16927 df-topn 16928 df-0g 16946 df-gsum 16947 df-topgen 16948 df-pt 16949 df-prds 16952 df-xrs 17007 df-qtop 17012 df-imas 17013 df-xps 17015 df-mre 17089 df-mrc 17090 df-acs 17092 df-mgm 18114 df-sgrp 18163 df-mnd 18174 df-submnd 18219 df-mulg 18489 df-cntz 18711 df-cmn 19172 df-psmet 20355 df-xmet 20356 df-met 20357 df-bl 20358 df-mopn 20359 df-fbas 20360 df-fg 20361 df-cnfld 20364 df-top 21791 df-topon 21808 df-topsp 21830 df-bases 21843 df-cld 21916 df-ntr 21917 df-cls 21918 df-nei 21995 df-lp 22033 df-perf 22034 df-cn 22124 df-cnp 22125 df-haus 22212 df-tx 22459 df-hmeo 22652 df-fil 22743 df-fm 22835 df-flim 22836 df-flf 22837 df-xms 23218 df-ms 23219 df-tms 23220 df-cncf 23775 df-limc 24763 df-dv 24764 df-log 25445 df-asin 25748 |
This theorem is referenced by: sinacos 25788 |
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