Find a Rectangular Equation for the Plane Curve Defined by the Parametric

Multiple Choice

Find a rectangular equation for the plane curve defined by the parametric equations.
- $$x = \sin t , y = 3 \cos t$$

A) $x ^ { 2 } + 9 y ^ { 2 } = 1$
B) $9 x ^ { 2 } + y ^ { 2 } = 1$
C) $9 x ^ { 2 } + y ^ { 2 } = 9$
D) $x ^ { 2 } + 9 y ^ { 2 } = 9$