Question

How do you use the double angle or half angle formulas to simplify `1-2sin^2(2x)`?

Answer 1

The most simplified answer would be:
`cos(4x)`

Explanation:

`1-2sin^2(x)` is one of the double angle formulas for cos. Therefore, we have the formula in our problem.

Since the angle inside the sin is 2x, the double angle would be 4x, so we get cos(4x) as our answer.

Hope this helped!