The directions state to find any critical numbers of the function within the interval 0 < x < 2pi. The function is: [tex]h(x) = sin^2(x) + cos(x)[/tex] I've already found that the derivative is: [tex]2sin(x)cos(x) - sin(x)[/tex] I've set that equal to zero, and that's where I'm stuck. I guess this is more of an algebra question than anything. The answer I keep getting is: [tex]tan(x)/sin(x) = 2[/tex] However, I don't think its correct. So any help would be greatly appreciated.