Product to Sum Identities Calculator

Posted by Dinesh on

Use the simple trigonometry calculator to calculate product to sum of trigonometric identities online.

Product to Sum Trigonometry Identities Calculator

Formula:

Product to Sum Equations:
sin(?).sin(?) = [cos((?)-(?)) - cos((?)+(?))] / 2
cos(?).cos(?) = [cos((?)-(?)) + cos((?)+(?))] / 2
sin(?).cos(?) = [sin((?)+(?)) + sin((?)-(?))] / 2
cos(?).sin(?) = [sin((?)+(?)) - sin((?)-(?))] / 2
tan(?).tan(?) = [cos((?)-(?)) - cos((?)+(?))] / [cos((?)-(?)) + cos((?)+(?))]