CPM Homework Banner

Home > PC > Chapter 9 > Lesson 9.3.4 > Problem 9-147

9-147.

Solve: sin4 x − cos4 x = Homework Help ✎

Factor.

Simplify using identity.

Substitute:

sin2x = 1 − cos2x

Simplify.

Divide both sides by −2.

Square root both sides.

Solve for x.