$\"\"$

The polar equation is $\"\"$ .

Convert the polar equation to a rectangular equation.

$\"\"$ .

Apply tangent on each side.

$\"\"$

Substitute $\"\"$ .

$\"\"$

$\"\"$ .

The equation $\"\"$ is in the form of line equation $\"\"$ .

The graph of $\"\"$ is a line passing through the pole making an angle of $\"\"$ with the polar axis.

$\"\"$

Graph the equation $\"\"$ .

Graph:

$\"\"$

$\"\"$ .

The equation $\"\"$ is a line passing through the pole.

Graph of the equation $\"\"$ :

$\"\"$