I have no idea how to do this. Also I just copied and paste the whole problem word-for-word if any one wonders. I am trying to figure it out myself but I'm totally lost.

Find the terminal point

on the unit circle determined by the given value of

:

(a) If

, then

and

;

(b) If

, then

and

;

(c) If

, then

and

;

(d) If

, then

and

;

(e) If

, then

and

;

(f) If

, then

and

;

The terminal point coordinates are the (x,y) coordinates of these values. On your unit circle, start at (1,0), if t is positive, your will move around the unit circle counterclockwise to the value of t. If t is negative, you will move clockwise.

I'll give you the first two and then see if you can work the rest:

a) \(\displaystyle t= \frac{\pi}{2} \rightarrow (0,1)\)

b) \(\displaystyle t = - \frac{\pi}{2} \rightarrow (0,-1)\)

Can you see how this works?

Try the others and come back if you get stuck!