Calculus question:

Find the intervals on which f is increasing and decreasing.

f(x) = cos^2(x) on (-π,π)

Question

Calculus question:

Find the intervals on which f is increasing and decreasing.

f(x) = cos^2(x) on (-π,π)

anonymous · Answer

i took the derivative and i got f'(x) = -2sinxcosx. then i set it equal to zero and i solved and got x=(6nπ)/2. I'm not sure what I'm suppose to do next... Also I don't know if i solved right...

anonymous · Answer

do you have geogebra?
its a program you can download that you can enter the equation in and it will show you the graph.

anonymous · Answer

my professor uses it all the time so we can see where the concaves and the increases and decreases are

anonymous · Answer

i took the derivative and i got f'(x) = -2sinxcosx. then i set it equal to zero and i solved and got x=(6nπ)/2. I'm not sure what I'm suppose to do next... Also I don't know if i solved right...