Hi, I have a problem that arose in one of my courses that I've gotten stuck on. I reduced it to two equations in two unknowns but can't get any further. I've apparently forgotten all the trigonometry I used to know. C = Acos(x) + Bcos(y) 0 = Asin(x) + Bsin(y) where A,B,C are known but tedious to write (they are on the order of 10^(-19)). I'd appreciate any help you can offer. I'm sure the solution will be obvious once I see it.