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Mirrors > Home > MPE Home > Th. List > sinsub | Structured version Visualization version GIF version |
Description: Sine of difference. (Contributed by Paul Chapman, 12-Oct-2007.) |
Ref | Expression |
---|---|
sinsub | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (sin‘(𝐴 − 𝐵)) = (((sin‘𝐴) · (cos‘𝐵)) − ((cos‘𝐴) · (sin‘𝐵)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | negcl 11078 | . . 3 ⊢ (𝐵 ∈ ℂ → -𝐵 ∈ ℂ) | |
2 | sinadd 15725 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ -𝐵 ∈ ℂ) → (sin‘(𝐴 + -𝐵)) = (((sin‘𝐴) · (cos‘-𝐵)) + ((cos‘𝐴) · (sin‘-𝐵)))) | |
3 | 1, 2 | sylan2 596 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (sin‘(𝐴 + -𝐵)) = (((sin‘𝐴) · (cos‘-𝐵)) + ((cos‘𝐴) · (sin‘-𝐵)))) |
4 | negsub 11126 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 + -𝐵) = (𝐴 − 𝐵)) | |
5 | 4 | fveq2d 6721 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (sin‘(𝐴 + -𝐵)) = (sin‘(𝐴 − 𝐵))) |
6 | cosneg 15708 | . . . . . 6 ⊢ (𝐵 ∈ ℂ → (cos‘-𝐵) = (cos‘𝐵)) | |
7 | 6 | adantl 485 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (cos‘-𝐵) = (cos‘𝐵)) |
8 | 7 | oveq2d 7229 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((sin‘𝐴) · (cos‘-𝐵)) = ((sin‘𝐴) · (cos‘𝐵))) |
9 | sinneg 15707 | . . . . . . 7 ⊢ (𝐵 ∈ ℂ → (sin‘-𝐵) = -(sin‘𝐵)) | |
10 | 9 | adantl 485 | . . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (sin‘-𝐵) = -(sin‘𝐵)) |
11 | 10 | oveq2d 7229 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((cos‘𝐴) · (sin‘-𝐵)) = ((cos‘𝐴) · -(sin‘𝐵))) |
12 | coscl 15688 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (cos‘𝐴) ∈ ℂ) | |
13 | sincl 15687 | . . . . . 6 ⊢ (𝐵 ∈ ℂ → (sin‘𝐵) ∈ ℂ) | |
14 | mulneg2 11269 | . . . . . 6 ⊢ (((cos‘𝐴) ∈ ℂ ∧ (sin‘𝐵) ∈ ℂ) → ((cos‘𝐴) · -(sin‘𝐵)) = -((cos‘𝐴) · (sin‘𝐵))) | |
15 | 12, 13, 14 | syl2an 599 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((cos‘𝐴) · -(sin‘𝐵)) = -((cos‘𝐴) · (sin‘𝐵))) |
16 | 11, 15 | eqtrd 2777 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((cos‘𝐴) · (sin‘-𝐵)) = -((cos‘𝐴) · (sin‘𝐵))) |
17 | 8, 16 | oveq12d 7231 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (((sin‘𝐴) · (cos‘-𝐵)) + ((cos‘𝐴) · (sin‘-𝐵))) = (((sin‘𝐴) · (cos‘𝐵)) + -((cos‘𝐴) · (sin‘𝐵)))) |
18 | sincl 15687 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (sin‘𝐴) ∈ ℂ) | |
19 | coscl 15688 | . . . . 5 ⊢ (𝐵 ∈ ℂ → (cos‘𝐵) ∈ ℂ) | |
20 | mulcl 10813 | . . . . 5 ⊢ (((sin‘𝐴) ∈ ℂ ∧ (cos‘𝐵) ∈ ℂ) → ((sin‘𝐴) · (cos‘𝐵)) ∈ ℂ) | |
21 | 18, 19, 20 | syl2an 599 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((sin‘𝐴) · (cos‘𝐵)) ∈ ℂ) |
22 | mulcl 10813 | . . . . 5 ⊢ (((cos‘𝐴) ∈ ℂ ∧ (sin‘𝐵) ∈ ℂ) → ((cos‘𝐴) · (sin‘𝐵)) ∈ ℂ) | |
23 | 12, 13, 22 | syl2an 599 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((cos‘𝐴) · (sin‘𝐵)) ∈ ℂ) |
24 | 21, 23 | negsubd 11195 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (((sin‘𝐴) · (cos‘𝐵)) + -((cos‘𝐴) · (sin‘𝐵))) = (((sin‘𝐴) · (cos‘𝐵)) − ((cos‘𝐴) · (sin‘𝐵)))) |
25 | 17, 24 | eqtrd 2777 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (((sin‘𝐴) · (cos‘-𝐵)) + ((cos‘𝐴) · (sin‘-𝐵))) = (((sin‘𝐴) · (cos‘𝐵)) − ((cos‘𝐴) · (sin‘𝐵)))) |
26 | 3, 5, 25 | 3eqtr3d 2785 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (sin‘(𝐴 − 𝐵)) = (((sin‘𝐴) · (cos‘𝐵)) − ((cos‘𝐴) · (sin‘𝐵)))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1543 ∈ wcel 2110 ‘cfv 6380 (class class class)co 7213 ℂcc 10727 + caddc 10732 · cmul 10734 − cmin 11062 -cneg 11063 sincsin 15625 cosccos 15626 |
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 |
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-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-om 7645 df-1st 7761 df-2nd 7762 df-wrecs 8047 df-recs 8108 df-rdg 8146 df-1o 8202 df-er 8391 df-pm 8511 df-en 8627 df-dom 8628 df-sdom 8629 df-fin 8630 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-n0 12091 df-z 12177 df-uz 12439 df-rp 12587 df-ico 12941 df-fz 13096 df-fzo 13239 df-fl 13367 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 |
This theorem is referenced by: addsin 15731 subsin 15732 pilem2 25344 sinmpi 25377 sinhalfpim 25383 sinmulcos 43081 |
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