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Theorem adddir 10897

Description: Distributive law for complex numbers (right-distributivity). (Contributed by NM, 10-Oct-2004.)

**Assertion**
Ref	Expression
adddir	⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 + 𝐵) · 𝐶) = ((𝐴 · 𝐶) + (𝐵 · 𝐶)))

**Proof of Theorem adddir**
Step	Hyp	Ref	Expression
1		adddi 10891	. . 3 ⊢ ((𝐶 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐶 · (𝐴 + 𝐵)) = ((𝐶 · 𝐴) + (𝐶 · 𝐵)))
2	1	3coml 1125	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐶 · (𝐴 + 𝐵)) = ((𝐶 · 𝐴) + (𝐶 · 𝐵)))
3		addcl 10884	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 + 𝐵) ∈ ℂ)
4		mulcom 10888	. . 3 ⊢ (((𝐴 + 𝐵) ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 + 𝐵) · 𝐶) = (𝐶 · (𝐴 + 𝐵)))
5	3, 4	stoic3 1780	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 + 𝐵) · 𝐶) = (𝐶 · (𝐴 + 𝐵)))
6		mulcom 10888	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴 · 𝐶) = (𝐶 · 𝐴))
7	6	3adant2 1129	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴 · 𝐶) = (𝐶 · 𝐴))
8		mulcom 10888	. . . 4 ⊢ ((𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐵 · 𝐶) = (𝐶 · 𝐵))
9	8	3adant1 1128	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐵 · 𝐶) = (𝐶 · 𝐵))
10	7, 9	oveq12d 7273	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 · 𝐶) + (𝐵 · 𝐶)) = ((𝐶 · 𝐴) + (𝐶 · 𝐵)))
11	2, 5, 10	3eqtr4d 2788	1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐴 + 𝐵) · 𝐶) = ((𝐴 · 𝐶) + (𝐵 · 𝐶)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 (class class class)co 7255 ℂcc 10800 + caddc 10805 · cmul 10807

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-ext 2709 ax-addcl 10862 ax-mulcom 10866 ax-distr 10869

This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-sb 2069 df-clab 2716 df-cleq 2730 df-clel 2817 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-iota 6376 df-fv 6426 df-ov 7258

This theorem is referenced by: mulid1 10904 adddiri 10919 adddird 10931 muladd11 11075 00id 11080 cnegex2 11087 muladd 11337 ser1const 13707 hashxplem 14076 demoivreALT 15838 dvds2ln 15926 dvds2add 15927 odd2np1lem 15977 cncrng 20531 icccvx 24019 cnlmod 24209 sincosq1eq 25574 abssinper 25582 sineq0 25585 bposlem9 26345 cncvcOLD 28846 ipasslem1 29094 ipasslem11 29103 cdj3i 30704 mblfinlem3 35743 expgrowth 41842 fmtnofac2lem 44908 2zrngALT 45394