If (x,y) lies on the ellipse x2+2y3=2, then maximum value of x2+y2+2xy−1 is
A point P moves on x-y plane such that PS+PS′=4 where S(K,0) and S′(−0K,0), then which of the following is not true about the locus of P?
If the eccentric angles of two points P and Q on the ellipse 28x2+7y2=1 whose center is C, differ by a right angle, then the area of ΔCPQ is
The locus of chords of contact of perpendicular tangents to the ellipse a2x2+b2y2=1 touch another fixed ellipse is
Coordinates of the vertices B and C of a triangle ABC are (2,0) and (8,0) respectively. The vertex A is varying in such a way that 4tan.2B.tan.2C=1. Then locus of A is
If ω is one of the angles between the normals to the ellipse a2x2+b2y2=1 at the points whose eccentric angles are θ and 2π+θ, then sin2θ2cotω is