A. 2x2+2y2±40x±8y+56=0
B. 2x2+2y2-10x±18y+36=0
C. 11x2+11y2-10x-8y-16=0
D. x2+y2±10x±8y+16=0
The circle on the chord x cos α+ y sin α=p of the circle x2+y2=r2 as diameter is
The internal centre of similitude of the two circles x2+y2+6x-2y+1=0, x2+y2-2x-6y+9=0 is
If the line x+y+1=0 touches the circle x2+y2-3x+7y+14=0, then the point of contact is
The equation of the tangents to a circle x2+y2-4x-6y-12=0 and parallel to 4x-3y=1 are
Equation x2+2ax-b2=0 has real roots α, β and equation x2+2px-q2=0 has real roots γ, δ. If circle C is drawn with the points (α, γ), (β, δ) as extremities of a diameter, then the equation of C is
The equation of the circle passing through (0, 0) and cutting orthogonally the circles x2+y2+6x-15=0, x2+y2-8x+10=0 is
The equation of the circle passing through the points of intersection of the circle x2+y2-2x+4y-20=0, the line 4x-3y-10=0 and the point (3, 1) is
The equation of the circle touching the line 3x-4y-15=0 and belonging to the coaxal system having limiting points (2, 0), (-2, 0) is
The locus of the centre of the circles which touches externally the circle x2+y2-6x-6y+14=0 and also touches the y-axis is given byt the equation
The parametric equations of circle (x-3)2+(y-2)2=100 are