The polar curve represents which of the following Cartesian equations?

MATHEMATICS · Single correct · AP · AP Precalculus · Trigonometric and Polar Functions · Trigonometric and Polar Functions

Problem

The polar curve

r=\dfrac{2a}{1-\cos\theta}

represents which of the following Cartesian equations? (a)

(x-a)^{2}+y^{2}=a^{2}

(b)

x^{2}=4a(y+a)

(c)

y^{2}=4a(x+a)

(d)

y^{2}=4a(x-a)