The length of the chord of contact of the point `P(x_(1),y_(1))` w.r.t.the circle `S=0` with radius `r` is

The length of chord of contact of the point (3,6) with respect to the circle x^(2)+y^(2)=10 is

The equation of chord with mid-point P(x_(1),y_(1)) to the circle S=0 is

The chord of contact of (2,1) w.r.t to the circle x^(2)+y^(2)+4x+4y+1=0 is

Let AB be the chord of contact of the point (3,-3) w.r.t.the circle x^(2)+y^(2)=9. Then the locus of the or the centre of Delta PAB, where P be any moving point on the circle is

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

Let AB be chord of contact of the point (5,-5) w.r.t the circle x^(2)+y^(2)=5. Then find the locus of the orthocentre of the triangle PAB, where P is any point moving on the circle.

The equation of pair of tangents drawn from an external point P(x_(1),y_(1)) to circle S=0 is

Find the equation of the chord of contact of the point (1,2) with respect to the circle x^(2)+y^(2)+2x+3y+1=0