(a) If we mark off a distance t along the unit circle, starting at (1, 0) and moving in a counterclockwise direction, we arrive at the --Select--- point determined by t.
(b) What are the terminal points determined by $\pi$/2, $\pi$, -$\pi$/2, and 2$\pi$?
$\pi$/2
(x, y) =
$\pi$
(x, y) =
-$\pi$/2
(x, y) =
2$\pi$
(x, y) =