Let $S = 0$ is an ellipse whose vartices are the extremities of minor axis of the ellipse $E:\frac{{{x^2}}}{{{a^2}}} + \frac{{{y^2}}}{{{b^2}}} = 1,a > b$ If $S = 0$ passes through the foci of $E$ , then its eccentricity is (considering the eccentricity of $E$ as $e$ )
$\sqrt {\frac{{1 - 2{e^2}}}{{1 - {e^2}}}} $
$\frac{1}{{\sqrt {1 + {e^2}} }}$
$\frac{{1 - 2{e^2}}}{{1 - {e^2}}}$
$\frac{{{e^2}}}{{1 + {e^2}}}$
The centre of the ellipse $4{x^2} + 9{y^2} - 16x - 54y + 61 = 0$ is
Let $P$ be a variable point on the ellipse $x^2 + 3y^2 = 3$ , then the maximum perpendicular distance of $P$ from the line $x -y = 10$ is
The line, $ lx + my + n = 0$ will cut the ellipse $\frac{{{x^2}}}{{{a^2}}}$ $+$ $\frac{{{y^2}}}{{{b^2}}}$ $= 1 $ in points whose eccentric angles differ by $\pi /2$ if :
An ellipse with its minor and major axis parallel to the coordinate axes passes through $(0,0),(1,0)$ and $(0,2)$. One of its foci lies on the $Y$-axis. The eccentricity of the ellipse is
The locus of the poles of normal chords of an ellipse is given by