- #1
Veronica_Oles
- 142
- 3
Homework Statement
Simplify cos^2 8x - sin^2x
Homework Equations
The Attempt at a Solution
I thought it would be in the format of cos2x
But I can't seem to figure it out I tried cos (4 * 2x)
And I tried to change the sin^2x into 1-cos^2x and I could get any farther.
Not sure how else to simplify.