" 5.Find the extreme values of (i) "cos2x+cos^(2)x" ."

Find the extreme values of cos 2x+cos^2x

Find the extreme values of 3sin^(2)x+5cos^(2)x .

Find the extreme values of sin 2x -cos 2x over R.

Find the extreme values of 11 cos^(2) x+ 15 sin x cos x- 9 sin^(2) x .

Find the extreme values of cos^(2) theta - sin^(2) theta

The extreme values of cos^(6) x + sin^(6) x are

Find the extreme points of the following functions. Specify if the extremum is a maximum or minimum. Find the extreme values. y = 4cos2x - 3sin2x,x in (-pi/2, pi/2)