Tangent is drawn to ellipse $\frac{{{x^2}}}{{27}} + {y^2} = 1\,at\,(3\sqrt 3 \cos \theta ,\sin \theta )$ where $\theta \in (0, \pi /2)$ . Then the value of $\theta$ such that sum of intercepts on axes made by this tangent is minimum, is
$\pi /3$
$\pi /6$
$\pi /8$
$\pi /4$
If the length of the major axis of an ellipse is three times the length of its minor axis, then its eccentricity is
If $\theta $ and $\phi $ are eccentric angles of the ends of a pair of conjugate diameters of the ellipse $\frac{{{x^2}}}{{{a^2}}} + \frac{{{y^2}}}{{{b^2}}} = 1$, then $\theta - \phi $ is equal to
The line $12 x \,\cos \theta+5 y \,\sin \theta=60$ is tangent to which of the following curves?
The locus of the point of intersection of the perpendicular tangents to the ellipse $\frac{{{x^2}}}{9} + \frac{{{y^2}}}{4} = 1$ is
If the distance between the foci of an ellipse is $6$ and the distance between its directrices is $12$, then the length of its latus rectum is