Theorem 3anbi3d 1318

Description: Deduction adding conjuncts to an equivalence. (Contributed by NM, 8-Sep-2006.)

Hypothesis

Ref	Expression
3anbi1d.1	|- ( ph -> ( ps <-> ch ) )

Assertion

Ref	Expression
3anbi3d	|- ( ph -> ( ( th /\ ta /\ ps ) <-> ( th /\ ta /\ ch ) ) )

Proof of Theorem 3anbi3d

Step	Hyp	Ref	Expression
1		biidd 172	. 2 |- ( ph -> ( th <-> th ) )
2		3anbi1d.1	. 2 |- ( ph -> ( ps <-> ch ) )
3	1, 2	3anbi13d 1314	1 |- ( ph -> ( ( th /\ ta /\ ps ) <-> ( th /\ ta /\ ch ) ) )

Syntax hints:   -> wi 4   <-> wb 105   /\ w3a 978

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This theorem depends on definitions:  df-bi 117  df-3an 980

This theorem is referenced by:  ceqsex3v  2780  ceqsex4v  2781  ceqsex8v  2783  vtocl3gaf  2807  mob  2920  ordsoexmid  4562  tfr1onlemaccex  6349  tfrcllemaccex  6362  fseq1m1p1  10095  summodc  11391  fsum3  11395  divalglemnn  11923  divalglemeunn  11926  divalglemex  11927  divalglemeuneg  11928  mhmlem  12978  ring1  13236  lmodlema  13382