[Calculus] Increasing Functions

I need help with a trigonometry increasing functions question. "The function f is defined by f(x) = tanxsecx, where 0 < x < 360. Find the values of x for which f is an increasing function. I've found f'(x) = secx (tan² x + sec² x), but i'm not too sure how to continue. I know that for f(x) to be increasing, f'(x) > 0. But again i'm not sure how to go about solving. Any help is appreciated!