lf $e_1$ , $e_2$ and $e_3$ are eccentricities of the conics $y = {x^2} - x + 3,\,\frac{{{x^2}}}{{{a^2}}} + \frac{{{y^2}}}{{3{a^4}}} = 1$ and ${a^2}{x^2} - 3{a^4}{y^2} = 1$ respectively, then which of the following is correct ? (where $a > 1)$
$e_3 < e_1 < e_2$
$e_2 < e_1 < e_3$
$e_3 < e_2 < e_1$
$e_1 < e_2 < e_3$
The graph of the conic $x^2-(y-1)^2=1$ has one tangent line with positive slope that passes through the origin. The point of the tangency being $(a, b)$ then find the value of $\sin ^{-1}\left(\frac{a}{b}\right)$
The foci of the hyperbola $2{x^2} - 3{y^2} = 5$, is
Eccentricity of the hyperbola conjugate to the hyperbola $\frac{{{x^2}}}{4} - \frac{{{y^2}}}{{12}} = 1$ is
The product of the lengths of perpendiculars drawn from any point on the hyperbola $x^2 -2y^2 -2=0$ to its asymptotes is
The equation of the hyperbola whose directrix is $x + 2y = 1$, focus $(2, 1)$ and eccentricity $2$ will be