1. Find the angle of smallest positive measure coterminal with an angle of the given measure:

Question

a. 520
b. - 75

2. Points A (1,0) and B (.6,-.8) are points on a unit circle O. If the measure of angle AOB = 0 {w/ a line in the middle}

Find
a. sin 0
b. cos 0
c. tan 0

Answer 1

Ok I understand the first one. I have to subtract 520 - 360 = 160. But for the second question, I'm confused but I know x is always cos and y is always sin. I don't know how to use that to find sin 0 and etc.

Answer 2

Now thinking about it, should i use the distance formula for both of these two coordinates. I'm a little confused about this.