$\"\"$

The polar coordinates of point is $\"\"$ .

Let the polar coordinates of point is $\"\"$ .

Polar-to-rectangular coordinates :

$\"\"$

Where angle $\"image\"$ is in radians.

Find the value of $\"\"$ :

$\"\"$ .

Find the value of $\"\"$ :

$\"\"$ .

Therefore, the rectangular coordinates of the point $\"\"$ is $\"\"$ .

$\"\"$

The rectangular coordinates of the point $\"\"$ is $\"\"$ .