The chord of contact of tangents from a point P to a circle passes through Q. If `l_1` and `l_2`are the lengths of the tangents from P and Q to the circle ,then PQ is equal to

The chord of contact of tangents from a point P to a circle passes through Q, If l_1 and l_2 are the lengths of tangents from P and Q to the circle, then PQ is equal to :

The lengths of the two tangents from an external point to a circle are equal.

If the chord of contact of tangents from a point P to a given circle passes through Q , then the circle on P Q as diameter. (a)cuts the given circle orthogonally (b)touches the given circle externally (c)touches the given circle internally (d)none of these

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

If a point P is 17 cm from the centre of a circle of radius 8 cm, then find the length of the tangent drawn to the circle from point P.

If the length of the tangent from an external point P to a circle of radius 10cm. Is 24cm, then the distance of P from the centre is

O is the centre of a circle. An external point P is 26 cm away from the centre of the circle and the length of the tangent (PT) drawn from the point P to the circle at T is 10 cm. Calculate the length of the diameter of the circle.

P is a point inside a circel: NO tangent of the circle will pass through P.

The lengths of the tangents from P(1,-1) and Q(3,3) to a circle are sqrt(2) and sqrt(6) , respectively. Then, find the length of the tangent from R(-1,-5) to the same circle.

If the chord of contact of tangents from a point (x_1,y_1) to the circle x^2+y^2=a^2 touches the circle (x-a)^2+y^2=a^2 , then the locus of (x_1,y_1) is :