$\"\"$

The point is $\"\"$ and rectangular coordinates $\"\"$ .

Find pair of rectangular coordinates: $\"\"$ and $\"\"$ .

Find $\"\"$ :

Substitute $\"\"$ in the formula of rectangular coordinates.

$\"\"$

$\"\"$ .

Find $\"\"$ :

By using conversion formula, Because of $\"\"$ , Then $\"\"$ .

$\"\"$

$\"\"$ .

The pair of rectangular coordinates is $\"\"$ or $\"\"$ . $\"\"$

$\"\"$ or $\"\"$ .