$\"\"$

The polar equation is is $\"\"$ .

Rewrite the equation as $\"\"$ .

$\"\"$ .

The polar coordinates $\"\"$ are related to the rectangular coordinates $\"\"$ as follows,

$\"\"$

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

$\"\"$

Apply squaring on each side.

$\"\"$

The rectangular equation corresponds to $\"\"$ is $\"\"$ .

$\"\"$

The rectangular equation is $\"\"$ .