Question

rewrite the expression sin^2(2x) in terms of the first power of the cosine

Answer 1

\[1- \cos4x \div 2 \]

Answer 2

Thanks! Can you provide an explanation to the solution?

Answer 3

use the identity :
sin^2 (p) = (1 - cos(2p))/2
now, change p = 2x,
thus, sin^2 (2x) = (1 - cos(2 * 2x))/2 = (1 - cos(4x))/2

Answer 4

Nice! Great explanation! Thanks so much! ;)

Answer 5

you;re welc0me