Question: The terminal arm of angle A goes through a point P. In each of following cases, find the exact values of sin(A) and cos(A) in the simplest radical form:
1) P(0, 5)
2) P(-8, 15)
3) P(√3, -1)
4) P(-4, -4)
I understand how to find the sign and cosine for unit circles, but what do you do when it is not a unit circle?