QJEEAdv03Ma84c1: JEE Advanced 2003 Mathematics - Class 11 JEEAdv03Ma84c1 Solution: For the circle , find the value of r for which the area…

For the circle ${x^2}\, + \,{y^2} = {r^2}$ , find the value of r for which the area enclosed by the tangents drawn from the point P (6, 8) to the circle and the chord of contact is maximum.