51.(A)
(B)
(C)
(D)
(E)
52.
(A)
(B)
(C)
(D)
(E)BC ONLY
The graph in the xy-plane represented by x = 3 + 2 sin t and y = 2 cos t −
1, for −π ≤ t ≤ π, is
a semicircle
a circle
an ellipse
half of an ellipse
a hyperbola= 0
=
= 1
= 2
does not exist