$\"\"$

The equation is $\"\"$ .

Apply $\"\"$ on both sides of the equation.

$\"\"$

From the trigonometric identity : $\"\"$ .

From the trigonometric ratio table : $\"\"$ .

$\"\"$

Multiply the numerator and denominator by $\"\"$ .

$\"\"$ .

The polar coordinates are related to Cartesian coordinates by the equation $\"\"$ .

Where $\"\"$ .

$\"\"$

The line equation is $\"\"$ .

The equation is a line with slope $\"\"$ .

The $\"\"$ intercept is $\"\"$ .