A. α
B. 2α
C. 4α
D. α/2
The area of the triangle formed by the positive x-axis and the tangent and the normal at (1, √3) to the circle x2+y2=4 is
The locus of the points from which the lengths of the tangents to the two circles x2 + y2 + 4x + 3 = 0, x2 + y2-6x +5 = 0 are in the ratio 2 : 3 is a circle with centre
The equation to the line joining the centers of the circles belonging to the coaxial system of Circles 4x2-4y2-12x+ 6y-3+λ(x+2y-6)=0 is
x2+y2-4x-6y+9=0 and (x+3)2+(y+2)2=25 are two circles. The line x=2 is a
The equation of the circle passing through the point (1, -2) and having its centre on the line 2x-y-14=0 and touching the line4x+3y-23=0 is
The equation to the pair of tangents drawn from (3, 2) to the circle x2+y2-6x+4y-2=0 is
The equation of one tangent to the circle with Centre(2,-1) from the origin is 3x + y = 0, then the equation of the other tangent through the origin is
The equation to the circle which is such that the lengths of the tangents to it from the points (1,0), (2,0) and (3,2)are 1,√7, √2, respectively is
The locus of the centre of the circles which touché both the circles x2+y2=a2 and x2+y2=4ax externally has the equation
The locus of the centre of the circle which cuts the circles x2+y2+4x-6y+9=0 and x2+y2-4x+6y+4=0 orthogonally is