Inverse Trig Functions

It was horribly boring teaching how to calculate indefinite integrals which were inverse trig functions so I mixed up in the last class. I didn't give them any of the formulas. Instead I had them calculate some derivatives and rewrite as anti--derivatives. It turned out fairly well. Here is the pdf I gave to the class. I had them work in groups of 3 to 5. I walked around listening to them talk and would randomly jump in when I heard something interesting.