A double ordinate of the curve `y^(2)=4ax` is of lengh 8a. Prove that the line from the vertex its ends are at right angles.

If the double ordinate of the parabola y^(2)=8x is of length 16 then the angle subtended by it at the vertex of the parabola is

Length of the double ordinateof the parabola y^(2) = 4x , at a distance of 16 units from its vertex is

The angle between curves y^2=4ax,ay=2x^2 is

PQ is a double ordinate of the parabola y^(2)+4x . The locus of its point of trisection is

Prove that the normal chord at the point on y^(2) = 4ax , other than origin whose ordinate is equal to its abscissa subtends a right angle at the focus.

If a normal chord of a puint on the parabola y^(2) = 4ax , subtends a right angle at the vertex, then t =