The one which does not represent a hyperbola is
$xy = 1$
${x^2} - {y^2} = 5$
$(x - 1)(y - 3) = 3$
${x^2} - {y^2} = 0$
The reciprocal of the eccentricity of rectangular hyperbola, is
The asymptote of the hyperbola $\frac{{{x^2}}}{{{a^2}}} - \frac{{{y^2}}}{{{b^2}}}= 1$ form with any tangent to the hyperbola a triangle whose area is $a^2$ $\tan$ $ \lambda $ in magnitude then its eccentricity is :
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
The eccentricity of the hyperbola $4{x^2} - 9{y^2} = 16$, is