A. (x2+y2-12x-5y)2=289(x2+y2)
B. (x2+y2+12x+5y)2=87(x2+y2)
C. (3x2-3y2-13x-3y)2=18(x2+y2)
D. (x2+y2+15x+15y)2=89(x2-y2)
If (3,2 )is limiting point of the coaxal system of circles whose common radical axis is 4x+2y=11, then the other limiting point is
An equilateral triangle is inscribed in the circle x2+y2=a2 . The length of the side of the triangle is
The length of the intercept made by the circle x2+y2-12x+14y+11=0 on x-axis is
I: The equation of the circle concentric with x2+y2-2x+8y-23=0 and passing through (2, 3) is x2+y2-2x+8y-33=0
II: : The equation of the circle passing through the points (1, 1), (2, -1), (3, 2) is x2+y2-5x-y+4=0
If a circle passes through the point (a, b) and cuts the circle x2+y2=4 orthogonally, then the locus of its centre is
The line 4x+4y-11=0 intersects the circle x2+y2-6x-4y+4=0 at A and B. The point of intersection of the tangents A, B is
If 4l2-5m2+6l+1=0, then the line lx+my+1=0 touches the circle
The equation of the circle whose radius is 5 and which touches the circle x2+y2-2x-4y-20=0 at the point (5, 5) is
A: The polar of (2, 3) with respect to the circle x2+y2-4x-6y+5=0 is 2x+3y=0
R: The polar of (x1, y1) with respect to the circle S=0 is S1=0
The locus of poles of tangets to the circle (x-p)2+y2=b2 w.r.t the circle x2+y2= a2 is