Theorem div12ap 8611

Description: A commutative/associative law for division. (Contributed by Jim Kingdon, 25-Feb-2020.)

Assertion

Ref	Expression
div12ap	|- ( ( A e. CC /\ B e. CC /\ ( C e. CC /\ C # 0 ) ) -> ( A x. ( B / C ) ) = ( B x. ( A / C ) ) )

Proof of Theorem div12ap

Step	Hyp	Ref	Expression
1		divclap 8595	. . . . 5 |- ( ( B e. CC /\ C e. CC /\ C # 0 ) -> ( B / C ) e. CC )
2	1	3expb 1199	. . . 4 |- ( ( B e. CC /\ ( C e. CC /\ C # 0 ) ) -> ( B / C ) e. CC )
3		mulcom 7903	. . . 4 |- ( ( A e. CC /\ ( B / C ) e. CC ) -> ( A x. ( B / C ) ) = ( ( B / C ) x. A ) )
4	2, 3	sylan2 284	. . 3 |- ( ( A e. CC /\ ( B e. CC /\ ( C e. CC /\ C # 0 ) ) ) -> ( A x. ( B / C ) ) = ( ( B / C ) x. A ) )
5	4	3impb 1194	. 2 |- ( ( A e. CC /\ B e. CC /\ ( C e. CC /\ C # 0 ) ) -> ( A x. ( B / C ) ) = ( ( B / C ) x. A ) )
6		div13ap 8610	. . 3 |- ( ( B e. CC /\ ( C e. CC /\ C # 0 ) /\ A e. CC ) -> ( ( B / C ) x. A ) = ( ( A / C ) x. B ) )
7	6	3comr 1206	. 2 |- ( ( A e. CC /\ B e. CC /\ ( C e. CC /\ C # 0 ) ) -> ( ( B / C ) x. A ) = ( ( A / C ) x. B ) )
8		divclap 8595	. . . . . 6 |- ( ( A e. CC /\ C e. CC /\ C # 0 ) -> ( A / C ) e. CC )
9	8	3expb 1199	. . . . 5 |- ( ( A e. CC /\ ( C e. CC /\ C # 0 ) ) -> ( A / C ) e. CC )
10		mulcom 7903	. . . . 5 |- ( ( ( A / C ) e. CC /\ B e. CC ) -> ( ( A / C ) x. B ) = ( B x. ( A / C ) ) )
11	9, 10	sylan 281	. . . 4 |- ( ( ( A e. CC /\ ( C e. CC /\ C # 0 ) ) /\ B e. CC ) -> ( ( A / C ) x. B ) = ( B x. ( A / C ) ) )
12	11	3impa 1189	. . 3 |- ( ( A e. CC /\ ( C e. CC /\ C # 0 ) /\ B e. CC ) -> ( ( A / C ) x. B ) = ( B x. ( A / C ) ) )
13	12	3com23 1204	. 2 |- ( ( A e. CC /\ B e. CC /\ ( C e. CC /\ C # 0 ) ) -> ( ( A / C ) x. B ) = ( B x. ( A / C ) ) )
14	5, 7, 13	3eqtrd 2207	1 |- ( ( A e. CC /\ B e. CC /\ ( C e. CC /\ C # 0 ) ) -> ( A x. ( B / C ) ) = ( B x. ( A / C ) ) )

Syntax hints:   -> wi 4   /\ wa 103   /\ w3a 973   = wceq 1348   e. wcel 2141   class class class wbr 3989  (class class class)co 5853   CCcc 7772   0cc0 7774   x. cmul 7779   # cap 8500   / cdiv 8589

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-cnex 7865  ax-resscn 7866  ax-1cn 7867  ax-1re 7868  ax-icn 7869  ax-addcl 7870  ax-addrcl 7871  ax-mulcl 7872  ax-mulrcl 7873  ax-addcom 7874  ax-mulcom 7875  ax-addass 7876  ax-mulass 7877  ax-distr 7878  ax-i2m1 7879  ax-0lt1 7880  ax-1rid 7881  ax-0id 7882  ax-rnegex 7883  ax-precex 7884  ax-cnre 7885  ax-pre-ltirr 7886  ax-pre-ltwlin 7887  ax-pre-lttrn 7888  ax-pre-apti 7889  ax-pre-ltadd 7890  ax-pre-mulgt0 7891  ax-pre-mulext 7892

This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-nel 2436  df-ral 2453  df-rex 2454  df-reu 2455  df-rmo 2456  df-rab 2457  df-v 2732  df-sbc 2956  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-id 4278  df-po 4281  df-iso 4282  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-iota 5160  df-fun 5200  df-fv 5206  df-riota 5809  df-ov 5856  df-oprab 5857  df-mpo 5858  df-pnf 7956  df-mnf 7957  df-xr 7958  df-ltxr 7959  df-le 7960  df-sub 8092  df-neg 8093  df-reap 8494  df-ap 8501  df-div 8590

This theorem is referenced by:  div2negap  8652  div12apd  8744  efival  11695  cos01bnd  11721  cos01gt0  11725  sincosq4sgn  13544