Have you tried anything yet?
On the first problem, can we change that csc(x) and tan(x) to something a bit more managable? Perhaps sines and cosines? From there, it should be a bit clearer. On the second, can we factor anything? I always factor whenever I can, and in doing so, a trig identity that I can work with usually becomes apparent. Finally, there is one off the bat that you can work with here.