If the area of the quadrilateral by the tangents from the origin to the circle `x^2+y^2+6x-10 y+c=0` and the radii corresponding to the points of contact is `15 ,` then a value of `c` is 9 (b) 4 (c) 5 (d) 25

If the area of the quadrilateral formed by the tangent from the origin to the circle x^(2)+y^(2)+6x10y+c=0 and the pair of radii at the points of contact of these tangents to the circle is 8 sq.units,then c is a root of the equation

Find the area of the triangle formed by the tangents from the point (4,3) to the circle x^(2)+y^(2)=9 and the line joining their points of contact.

If the area of a quadrilateral formed by the tangents from the origin to x^(2) + y^(2) + 6x - 10y + lambda =0 and the pair of radii at the points of contact of these tangents to the circle, is 8 cm^(2) , then the value of lambda must be

find the area of the quadrilateral formed by a pair of tangents from the point (4,5) to the circle x^(2)+y^(2)-4x-2y-11=0 and pair of its radii.