In an ellipse the distance between the foci is 8 and the distance between the directrices is 25. The length of major axis is : (A) `5sqrt(2)` (B) `10sqrt(2)` (C) `20sqrt(2)` (D) none of these

In an ellipse the distance between the foci is 8 and the distance between the directrices is 25, then the ratio of the length of major and minor axis is

Find the equation of an ellipse the distance between the foci is 8 units and the distance between the directrices is 18 units.

Find the equation of ellipse whose distance between foci is 8 units and distance between the directrices is 18 units.

If distance between the foci of an ellipse is 6 and distance between its directrices is 12, then length of its latus rectum is : (A)4 (B) 3sqrt2 (C)9 (D) 2sqrt2

Find the distance between the origin and (3sqrt5,-2)

If radii are 2, sqrt2 and distance between centres is sqrt2 then the angle between the circles is

If the distance between the directrices is thrice the distance between the foci, then find eccentricity of the ellipse.

If the distance between the foci and the distance between the two directricies of the hyperbola (x^2)/(a^2)-(y^2)/(b^2)=1 are in the ratio 3:2, then b : a is (a) 1:sqrt(2) (b) sqrt(3):sqrt(2) (c) 1:2 (d) 2:1

If the distance between the foci and the distance between the two directricies of the hyperbola (x^2)/(a^2)-(y^2)/(b^2)=1 are in the ratio 3:2, then b : a is (a) 1:sqrt(2) (b) sqrt(3):sqrt(2) (c) 1:2 (d) 2:1

The eccentricity of the ellipse if the distance between the foci is equal to the length of the latus rectum is a. (sqrt(5)-1)/2 b. (sqrt(5)+1)/2 c. (sqrt(5)-1)/4 d. none of these