This isn't a problem, but I need help understanding this so I can do problems. http://img255.imageshack.us/img255/3479/xythingat6.png [Broken] So let's say... 1. This is part of the motion of a projectile 2. You're trying to find x and y There are trig. identities that will give you x and y. Example: x = sin(36)*10 y = cos(36)*10 My question is... Which trig. identity/function do you use to solve for x, and why do you use that identity? Also explain the same thing for y. Please and thank you.