Focus of the conic is at origin.

Case (I) :

If the point is in rectangular coordinates :

To find the distance between the point and focus, use the distance formula.

Distance between the focus and the point is .

Case (II) :

If the point is in polar coordinates :

To find the distance between the point and focus, use the distance formula.

Distance between the focus and the point is .

Case (III) :

If the angle is provided.

Substitute the value of in the conic equation and solve it for .

Distance between the focus and the point is .

If the point is in rectangular coordinates then distance is .

If the point is in polar coordinates then distance is .

If the angle is provided, distance is .