$\"\"$

The eccentricity of the conic is $\"\"$ .

The directrix of the conic is parallel to polar axis $\"\"$ above the pole.

Since the eccentricity is $\"\"$ , the conic is parabola.

The general form of the parabola is $\"\"$ .

Where the eccentricity is $\"\"$ and $\"\"$ is the distance between the polar axis to directrix.

Substitute $\"\"$ and $\"\"$ in $\"\"$ .

$\"\"$

$\"\"$ .

The polar equation is $\"\"$ .

$\"\"$

The polar equation is $\"\"$ .