Question

Question #15c3e

Answer 1

Find values of x's where `f'(x)=0`

Explanation:

`f'(x) = cos(theta)-2cos(theta)sin(theta)=cos(theta)[1-2sin(theta)]=0`

`cos(theta)=0` where `theta=(pi/2 or (3pi)/2) +-2pi`

`[1-2sin(theta)]=0` where `theta=(pi/6 or (5pi)/6) +-2pi`

hope that helped