Question

Simplify 2sin7x sinx cos7x cosx with steps

Answer 1

Answer:

cos 7x cos x. sin 5x sin 2x sin 4x cos x= [sin ( 4x+x)+sin (4x-x)]= (sin 5x+sin 3x). 1. 2. 1. 2. 1 ... 2 sin 7x cos 2x ... Simplify. The sine function is odd: The cosine function is even ...