I presume these are

and

We know that cosine is positive and cotangent is negative. Where does this happen? In Quadrant IV. Thus we know where the angle is.

We want . Well, we know that , so we can get that easily enough. (Note that sine is negative in QIV.)

Getting is pretty easy:

Now the last two are also easy:

and

-Dan

Edit: I just thought of another way to get :

This is a faster method, if you know how to deal with the complex fraction.