AB is any chord of the circle `x^2+y^2-6x-8y-11=0` which subtends an angle `pi/2` at `(1,2)`. If locus of midpoint of AB is a circle `x^2+y^2-2ax-2by-c=0`; then find the value of `(a+b+c)`.

The locus of mid point of chord of the circle x^(2)+y^(2)+2ax-2y-23=0 length 8 unit is

The locus of the mid-points of the chords of the circles x^(2)+y^(2)-2x-4y-11=0 which subtends an angle of 60 at centre is

Comprehension (Q.5 & 6 ) Let AB be any chord of the circle x^(2)+y^(2)-2x-6y-6=0 which subtends a right angle at the point (2, 4).Locus of mid point of AB is x^(2)+y^(2)-7y-16=0x^(2)+y^(2)-3x-7y+7=0x^(2)+y^(2)+3x+7y-16=0x^(2)+y^(2)+3x+7y-7=0

Locus of mid point of chord AB of a circle x^(2)+y^(2)=4 which subtends 90^(@) angle (1,0)

Find the equation of the chord of the circle x^(2)+y^(2)+6x+8y-11=0, whose midpoint is (1,-1)

The locus of the midpoint of chord of the circle x^(2)+y^(2)=1 which subtends a right angle at the origin is

The locus of the midpoint of the chord of the circle x^2 + y^2 =4 which subtends a right angle at the origin is?

AB is a chord of the circle x^(2)+y^(2)=9 .The tangents at A and B intersect at C. If M(1,2) is the midpoint of AB,then the area of triangle ABC is