Products to Sums and Differences (Leaving Cert Mathematics): Quizzes

Products of trig functions to sums

$\frac{1}{2}[\sin(A+B) + \sin(A-B)]$

$\frac{1}{2}[\sin(A+B) - \sin(A-B)]$

$\frac{1}{2}[\cos(A+B) + \cos(A-B)]$

$-\frac{1}{2}[\cos(A+B) - \cos(A-B)]$

Addition and subtraction identities

Signal processing

$\frac{1}{2}[\sin 5x + \sin x]$

$\frac{1}{2}[\cos 6x + \cos 2x]$

Simplify trigonometric expressions