Length of tangent from a Point to a Circle.

The length of the tangent from a point A to a circle, of radius 3cm, is 4cm. The distance of A from the centre of the circle is

The length of the tangent from a point A at a circle,of radius 3cm, is 4cm. The distance of A from the centre of the circle is sqrt(7)cm(b)7cm (c) 5cm(d)25cm

The length of the tangent from a point at P at a circle of radius 3 cm is 4 cm . The distance of P from the centre of the circle is

The length of the tangent from a point on the circle x^(2)+y^(2)+4x6y-12=0 to the circle x^(2)+y^(2)+4x6y+4=0 is

The length of the tangent from a point on the circle x^(2)+y^(2)+4x-6y-12=0 to the circle x^(2)+y^(2)+4x-6y+4=0 is

The length of the tangent from a point on the circle x^(2)+y^(2)+4x-6y-12=0 to the circle x^(2)+y^(2)+4x-6y+4=0 is

Show that if the length of the tangent from a point P to the circle x^2 + y^2 = a^2 be four times the length of the tangent from it to the circle (x-a)^2 + y^2 = a^2 , then P lies on the circle 15x^2 + 15y^2 - 32ax + a^2=0 .

Show that if the length of the tangent from a point P to the circle x^2 + y^2 = a^2 be four times the length of the tangent from it to the circle (x-a)^2 + y^2 = a^2 , then P lies on the circle 15x^2 + 15y^2 - 32ax + a^2=0 .

The distance of the point from the centre of a circle with diameter of 16 cm is 17 cm. Then the length of the tangent from the point to the circle is

Length of tangent drawn from any point on the circle x^2+y^2+2gx + 2fy +c=0 to the circle : x^2+y^2+2gx+2fy+c'=0 is :