A. (-1, 1)
B. (-2, 2)
C. (1, -1)
D. (2, -2)
The equation of the tangent to the circle x2+y2+2x+2y-7=0 which makes 450 with the x axis is
If OA, OB are two equal chords of the circle x2+y2-2x+4y=0 perpendicular to each other and passing through the origin, then the equations of OA and OB are
If the line 2x+3y+1=0 and 3x-y-4=0 lie along diameters of a circle of circumference 10π, then the equation of the circle is
The intercept made by the circle x2+y2-2hx sin θ-2ky sinθ=h2 cos2θ on the x-axis is
The system of circle x2+y2+2λx-5=0 is
The equation of the tangent to the circle x2+y2-2x-4y+3=0 at (2, 3) is
The equation of the circle with centre (3, -2) and radius 3 is
The circles x2+y2-10x+16=0 and x2+y2=r2 intersect each other into distinct points if
The centre of the circle passing through the points (0, 0), (1, 0) and touching the circle x2+y2=9 is
Consider the circle x2+y2-4x-2y+c=0 whose centre is A(2, 1). If the point P(10, 7) is such that the line segment PA meets the circle in Q with PQ=5, then c=