A. x2+y2=9a2
B. x2+y2=16a2
C. x2+y2=4a2
D. x2+y2=a2
The circle x2+y2=4x+8y+5=0 intersects the line 3x-4y=m at two distinct points if
The line 2x+3y+19-0and 9x+6y-17=0 cut the coordinate axes in
The midpoint of the chord formed by the polar of (-9, 12) w.r.t x2+y2=100 is
For the circle x2+y2-6x+8y-1=0, the points (2, 3) (-2, -1) are
The condition that the chord xcosα+ysinα-p=0 of x2+y2-a2=0 may subtend a right angle at he cnetre of the circle is
The polar of the point(t-1, 2t) w.r.t the circle x2+y2-4x-6y+4=0 passes through the point of intersection of the lines
A rectangle ABCD is inscribed in a circle with a diameter lying along the line 3y=x+10. If A=(-6, 7), B=(4, 7) then the area of the rectangle is
The equation to the circle touching the y-axis at the origin and passing through(b, c) is
The line y=x+a√2 touches the circle x2+y2=a2 at P. The coordinates of P are
Equation of the tangent to the circle x2+y2=3, which is include at 600 with the x-axis is