First, cross multiply the denominators so that you have the LCD giving you:

Combine those because they have the same denominator and you get:

Now you can break about and so that they are and

Now you have:

Because you can combine all the into 1 and eliminate them leaving you with:

From here you can break it apart into:

from the first half cancels with the denominator leaving you with and the same with in the second half leaving you with

Now you have left:

Cross multiply again to get the LCD, then combine to get:

Because you can reduce both denominators to 1 which gives you:

There you are! If you have any questions feel free to ask.

Ah crap, on moment, need to recheck my answer, it comes up as two. sorry.

Well, I've thought about it for a while and come up with a complete block. If someone else could point me in another direction I would be much obliged. Sorry.

The only way I can think of doing it, is if you take:

then cancel Sin^2x on the left, and Cos^2x on the right and combine the denominator getting:

1/(Cos^2x + Sin^2x) = 1

and because you get 1/1

The problem is, I don't think you can combine denominators like that which I tried to do before anyway.