Theorem biancomd 271

Description: Commuting conjunction in a biconditional, deduction form. (Contributed by Peter Mazsa, 3-Oct-2018.)

Hypothesis

Ref	Expression
biancomd.1	⊢ (𝜑 → (𝜓 ↔ (𝜃 ∧ 𝜒)))

Assertion

Ref	Expression
biancomd	⊢ (𝜑 → (𝜓 ↔ (𝜒 ∧ 𝜃)))

Proof of Theorem biancomd

Step	Hyp	Ref	Expression
1		biancomd.1	. 2 ⊢ (𝜑 → (𝜓 ↔ (𝜃 ∧ 𝜒)))
2		ancom 266	. 2 ⊢ ((𝜃 ∧ 𝜒) ↔ (𝜒 ∧ 𝜃))
3	1, 2	bitrdi 196	1 ⊢ (𝜑 → (𝜓 ↔ (𝜒 ∧ 𝜃)))

Syntax hints:   → wi 4   ∧ wa 104   ↔ wb 105

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

This theorem is referenced by:  anbi1cd  468  oppr1g  13183  opprunitd  13210  sincosq1sgn  14118