# What are the extrema of #f(x)=-sin^2(ln(x^2))-cos^2(ln(x^2))# on the interval #[0,2pi]#?

##### 1 Answer

Apr 15, 2017

Factoring out the negative:

#f(x)=-[sin^2(ln(x^2))+cos^2(ln(x^2))]#

Recall that

#f(x)=-1#