A. 5(x2+y2)-2x+14y-35=0
B. x2+y2+30x-22y+121=0
C. x2+y2-18x-16y+120=0
D. x2+y2-46x-28y=0
cos(α+β+γ)+cos(α-β-γ)+cos(β-γ-α)+cos(γ-α-β) is equal to:
The equation of the circle passing through the point (1, 2) cutting the circle x2+y2-2x+8y+7=0 orthogonally and bisects the circumference of the circle x2+y2=9 is
Origin is the centre of a circle passing through the vertices of an equilateral triangle whose median is of length 3a, then the equation of the circle is
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