Answer:
- cos ^4 (x)
Step-by-step explanation:
(sinx^2 cosx^2) - cosx^2
Factor out cos ^2 x
cos^2 x(sin^2 x -1)
Factor out -1
-cos ^2 x (1 - sin ^2 x)
We know that 1 - sin^2 x = cos^2 x
- cos ^2 (x) * cos ^2 (x)
