Chapter 12.1, Problem 23E

(a)

To determine

To obtain: An equation in terms of x and y by eliminating the parameter t in the parametric equation $x=\cos t,y=1+\sin t;0\le t\le 2\pi$.

(b)

To determine

To describe: The curve whose parametric equation is $x=\cos t,y=1+\sin t;0\le t\le 2\pi$.