4. Let $2 \times 2 + \underset { 2 } { 2 } - 3 \times y = 0$ be the equation of a pair of tangents drawn from the origin O to a circle of radius 3 with centre in the first quadrant. If A is one of the points of contact, find the length of OA .
4. Let $2 \times 2 + \underset { 2 } { 2 } - 3 \times y = 0$ be the equation of a pair of tangents drawn from the origin O to a circle of radius 3 with centre in the first quadrant. If A is one of the points of contact, find the length of OA .\\