A. α2x2/a4+β2y2/b4=( x2/a2+y2/b2)2
B. α2x2/a4+β2y2/b4=( x2/a2-y2/b2)2
C. α2x2/a4+β2y2/b4=( x2/a2+y2/b2)2
D. α2x2/a4-β2y2/b4=( x2/a2-y2/b2)2
The points on the ellipse x2/25+y2/9=1 whose angles differ by a right angle are
The chord of contact of tangents drawn from points on x2/a2+y2/b2=1 to the circle x2+ y2=c2 touches the ellipse
The tangents are drawn to the ellipse x2/a2+y2/b2=1 at point where it is intersected by the line lx+my+n=0. The point of intersection of tangents at these points is
If the lines 4x+3y-1=0,x-y+5=0 and kx+5y-3=0 are concurrent,then k is equal to
The product of the slopes of the tangents to the ellipse 2x2+3y2=6 draw from the point (1, 2) is
The ordinate PN of P(a cos θ, b sin θ) on the ellipse x2/a2+y2/b2=1 meets the auxiliary circle at Q,. The locus of the point of intersection of normal at P and Q is
The locus of the middle point of chords of the ellipse x2/a2+y2/b2=1 whose pole lies on the auxiliary circle is
The midpoint of a chord 4x+5y-13=0 of the ellipse 2x2+5y2=20 is
The equation of the chord of the ellipse 2x2+3y2=6 having (1, -1) as its midpoint is
The locus of the poles of chords of the ellipse x2/a2+y2/b2=1 which touch The locus of the poles w.r.t the ellipse x2/α2+y2/β2=1 is