The distance between two directrices of a rectangular hyperbola is 10 units. Find the distance between its foci.

If the distance between two directrices of a rectangular hyperbola is 15, then the distance between its foci in units is:

e = 3/2 and distance between directrices = 8/3

Write the distance between the directrices of the hyperbola x=8sec theta,y=8tan theta

If the distance between foci of a hyperbola is twice the distance between its directrices, then the eccentricity of conjugate hyperbola is :

In an ellipse, the distance between its directrices is four times the distance between its foci. If (-2, 0) is one of its vertices, then the equation of the ellipse is

The equation to the hyperbola having its eccentricity 2 and the distance between its foci is 8 is