I have already solved this problem, thank you for all your help.
I simply had to set costheta = usintheta and then found tantheta by taking tanarccotu = 1/u.
I was trying to do wave superimposition earlier...
I need... a lot of help. I spent an hour on this and a whole page of paper to no avail or certainty.
http://img88.imageshack.us/img88/8794/phuhelphd1.png
Suppose there is a diagonal downward force from top right to bottom left on an object with weight w on a surface with coefficient of...