A. (a2-px)2=b2(x2+y2)

B. (a2-bx)2=p2(x2+y2)

C. (a2+px)2=b2(x2+y2)

D. (a2+bx)2=p2(x2+y2)

The equation of the circle, with centre (3, -1) and which cuts off a chord of length 6 on the line 2x-5y+18=0 is

If 1,ω,ω<sup>2</sup> are the cube roots of unity, then (1-ω+ ω<sup>2</sup>)5+(1+ω- ω<sup>2</sup>)<sup>5</sup> is equal to

The length of the tangent from a point on the circle x^{2}+y^{2}+4x-6y-12=0 to the circle x^{2}+y^{2}+4x-6y+4=0 is

The foot of the perpendicular from (0, 2, 3) to the line (x+3)/5 = (y-1)/2 = (z+4)/3 is:

A: The angle between the tangents drawn from origin to the circle x^{2}+y^{2}-14x+2y+25=0 is π/2

R: If θ is the angle between the pair of tangents drawn from (x_{1}, y_{1}) to the circle S=0 of radius r then tanθ/2=r/√S_{11}