If the angle between the straight lines joining the foci to an extremity of minor axis in an ellipse be \[90{}^\circ \]; then the eccentricity of the ellipse is

If the angle between the straight lines joining the foci to an extremi

1.	If the angle between the straight lines joining the foci to an extremity of minor axis in an ellipse be \[90{}^\circ \]; then the eccentricity of the ellipse is
A.	\[\frac{1}{2}\]
B.	\[\frac{1}{\sqrt{3}}\]
C.	\[\frac{1}{\sqrt{2}}\]
D.	\[\frac{1}{3}\]
Answer» D. \[\frac{1}{3}\]

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If the angle between the straight lines joining the foci to an extremity of minor axis in an ellipse be \[90{}^\circ \]; then the eccentricity of the ellipse is

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