If end points of one latus rectum with the point where major axis cuts directrix makes an equilateral triangle then eccentricity of ellipse is `sqrt((sqrt5-1)/2)`

S and T are the foci of an ellipse and B is the end point of the minor axis. If STB is equilateral triangle, the eccentricity of the ellipse is

If latus-rectum is one-third minor axis, then eccentricity of the ellipse is

S_(1) and S_(2) are the foci of an ellipse and B is the end of the minor axis. If the triangle S_(1) S_(2) B is an equilateral triangle, then eccentricity of the ellipse is

The length of the latus rectum of an ellipse is 1/3 of the major axis. Its eccentricity is

The length of the latus rectum of an ellipse is 1/3 of the major axis. Its eccentricity is

S , T are two foci of an ellipse and B is a one end point of minor axis . If STB be a equilateral triangle and eccentricity of the ellipse be (1)/(lambda) , then the value of lambda is _

The latus rectum of an ellipse is 1/3 of the major axis. It's eccentricity is

The length of the latus rectum of an ellipse in 1/3 of its major axis. Its eccentricity is :

Find the coordinate of the foci,the length of the major axis, minor axis, latus rectum and eccentricity of the ellipse x^2/25+y^2/9=1

The latus rectum of an ellipse is equal to one-half of its minor axis. The eccentricity of the ellipse is