$\"\"$

The condition is $\"\"$ and $\"\"$ .

Substitute the given information into the Polar distance formula

$\"\"$ .

Where $\"\"$ .

Missing coordinate is $\"\"$ .

$\"\"$

Substitute corresponding values in distance formula.

$\"\"$

Squaring on both sides.

$\"\"$

Therefore, the value of $\"\"$ is $\"\"$ .

$\"\"$

The value of $\"\"$ is $\"\"$ .