We've just started this today in first year applied maths at university. Today we were given the problem of deriving the formula for the area of an ellipse. I've got as far as saying there's some relationship between the semi-major axis and the semi-minor axis on the one hand, and the area of the ellipse on the other, but now I'm stuck.
I do not want a direct answer to the problem. I'm looking for a good online tutorial for these sorts of problems that might get me thinking in the right way. I've tried doing a search myself, but keep getting stuff on performing conversions. Can anyone point me to a good source for my purposes?