A. 4
B. -9
C. -3
D. -5
Equation of the circle touching the y-axis at (0, √3) and cuts the x-axis in the points (- 1, 0) and (-3, 0) is
The equation of the common tangent at the point contact of the circles x2+y2-10x+2y+10=0, x2+y2-4x-6y+12=0 is
The number of tangents that can be drawn from (6, 0) to the circle x2+y2-4x-6y-12=0 are
The locus of the middle points of portions of the tangents to the circle x2+y2=a2 terminated by the axes is
If the length of the tangets from two points A, B to a circles are 6, 7 respectively. If A, B are conjugate points then AB=
The length of the tangent from a point on the circle x2+y2+2gx+2fy+c=0 to the circle x2+y2+2gx+2fy+c’=0 is
The normal of the circle(x-2)2+(y-1)2=16 which bisects the chord cut off by the line x-2y-3=0 is
The length of the common chord of the circles (x-a)2+(y-b)2=c2 and (x-b)2+(y-a)2=c2
The external centre of similitude of the two circles x2+y2-2x-6y+9=0, x2+y2=4 is
The longest distance from (-3, 2) to the circles x2+y2-2x+2y+1=0 is