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9-71.

For each set of parametric equation in problem 9-70, describe what part of the curve is sketched in each case when −2 ≤ t ≤ 2 . Homework Help ✎

The curve will start at (cos(–2), sin(–2)), pass through (cos(0), sin(0)), and end at (cos(2), sin(2)).
Evaluate and graph these points.

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.