CPM Homework Help : CALC3RD Problem 9-70

For each set of parametric equation in problem 9-69, describe what part of the curve is sketched in each case when $-2\le t\le2$ .

Hint (a):

The curve will start at $(\ \cos(-2),\ \sin(-2))$ , pass through $(\cos(0),\ \sin(0))$ , and end at $\left(\cos(2),\ \sin(2))\ \right)$ .
Evaluate and graph these points.

Hint (b):

The curve will start at $(\cos(-4),\sin(-4))$ , pass through $(\cos(0), \sin(0))$ , and end at $(\cos(4), \sin(4))$ .
Evaluate and graph these points.