## Thomas' Calculus 13th Edition

Given: $x=2 \cos t, y =2 \sin t; z=0$ Also, $x^2+y^2=(2\cos t)^2+(2 \sin t)^2=4$ and $z=0$ This represents a equation of a circle radius of the circle is $2$ in the plane $z=0$ . The answer is: Graph(g)