Curve $xy = {c^2}$ is said to be
Parabola
Rectangular hyperbola
Hyperbola
Ellipse
(b) $xy = {c^2}.$
Rectangular hyperbola ${a^2} = {b^2}$.
Let the foci of a hyperbola $\mathrm{H}$ coincide with the foci of the ellipse $E: \frac{(x-1)^2}{100}+\frac{(y-1)^2}{75}=1$ and the eccentricity of the hyperbola $\mathrm{H}$ be the reciprocal of the eccentricity of the ellipse $E$. If the length of the transverse axis of $\mathrm{H}$ is $\alpha$ and the length of its conjugate axis is $\beta$, then $3 \alpha^2+2 \beta^2$ is equal to :
The radius of the director circle of the hyperbola $\frac{{{x^2}}}{{{a^2}}} – \frac{{{y^2}}}{{{b^2}}} = 1$, is
The number of possible tangents which can be drawn to the curve $4x^2 – 9y^2 = 36$ , which are perpendicular to the straight line $5x + 2y -10 = 0$ is
For hyperbola $\frac{{{x^2}}}{{{{\cos }^2}\alpha }} – \frac{{{y^2}}}{{{{\sin }^2}\alpha }} = 1$ which of the following remain constant if $\alpha$ varies
A hyperbola, having the transverse axis of length $2 \sin \theta$, is confocal with the ellipse $3 x^2+4 y^2=12$. Then its equation is
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