Find a Polar Equation for the Parametric Equations $x = 5 \cos ^ { 2 } \theta , y = 5 \cos \theta \sin \theta$

Multiple Choice

Find a polar equation for the parametric equations $x = 5 \cos ^ { 2 } \theta , y = 5 \cos \theta \sin \theta$

A) $x ^ { 2 } + y ^ { 2 } = 25 \cos ^ { 2 } \theta$
B) $r = 5 \cos \theta$
C) $r = 5 \sin \theta$
D) $y = x \tan \theta$