Question

Cal help?
find the intervals for which f is increasing or decreasing and locate all relative extrema on (0,2pi).

f(x)= cos x / 1 + sin ^ 2x

Answer 1

did you take the derivative?

Answer 2

Yep I got f'(x) = 2 sin(x) cos (2x) + 5 /cos (2x)-3 )^2

Answer 3

it is so long im not sure its right

Answer 4

@satellite73

Answer 5

@RaphaelFilgueiras

Answer 6

could you help me solve that I have no idea how

Answer 7

use sin²(x)+cos²(x)=1-> cos²(x)=1-sin²(x), and then you will have only sin x in your equations