$\"\"$

The eccentricity of ellipse is $\"\"$ .

The directrix of ellipse is $\"\"$ .

$\"\"$ is positive and it is to the right of the focus.

Therefore, Standard from this conic with $\"\"$ is $\"\"$ .

Substitute $\"\"$ and $\"\"$ in standard form.

$\"\"$

The polar equation of the ellipse is $\"\"$ .

$\"\"$

The polar equation of the ellipse is $\"\"$ .