A. x2+y2=12
B. x2+y2=18
C. x2+y2=6
D. x2+y2=30
If the chord of contact of the point (1, -2) with respect to the ellipse 4x2+5y2=20 is ax+by+c=0 then the ascending order of a, b, c is
The locus of a point P for which the chord of contact of x2/a2+y2/b2=1 touch the circle x2+y2=r2
The value of k if (1, 2) (k, -1) are conjugate points with respect to the ellipse 2x2+3y2=6 is
Pole of the line 2x+3y+4=0 w.r.to the ellipse x2/2+y2/4=1 is
The equation of the normal at a point hose eccentric angle is 3π/2+θ to the ellipse x2/9+y2/4=1 is
If 2x-y+3=0, 4x+ky+3=0 are conjugate with respect to the ellipse 5x2+6y2-15=0 then k=
P(θ) and D(θ+π/2) are two points on the ellipse x2/a2+y2/b2=1. The locus of point of intersection of tangents at P and D to the ellipse is
If the variable line l1(x-a)+y=0 and l2(x+a)+y=0 are conjugate lines w. r. to the ellipse x2/a2+y2/b2=1. Then the locus of their point of intersection is
The locus of the poles w.r.t the ellipse x2/a2+y2/b2=1 of tangents to its auxiliary circle is
If the line lx+my=1 is a normal to the ellipse x2/a2+y2/b2=1 then a2/l2-b2/m2=1