Establish identity. cos 4 - sin 4 = cos(2)

Question:

Establish identity.

cos4 θ - sin4 θ = cos(2θ)

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  answer-question

Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

Question Posted: