What is the eccentricty of the hyperbola `9x^2-16y^2=144`.

Find the eccentricity of the hyperbola (ii) x ^2 /16 - y ^2 /9 = 1

Find the eccentricity of the hyperbola (i) x ^2 /4 - y ^2 = 1

Find the coordinates of vertices,the foci,the eccentricity and the equations of the directrix of the following hyperbola. x^2/16-y^2/9=1 .

Find the equations of the tangents to the hyperbola x ^2 - 2y ^2 = 18 which are perpendicular to the line x - y = 0.

Find the coordinates of vertices,the foci,the eccentricity and the equations of the directrix of the following hyperbola. 16x^2-9y^2=576 .

Find the equation of the directrices of the ellipse x^2/25+y^2/9=1 .

Find the equation of the tangents drawn from the point (2, 3) to the ellipse 9x ^2 + 16y ^2 = 144.

Find the product of the following. (9x^2+16y^2+12xy+6x-8y+4)(3x-4y-2)

Find the equation of the diameter of the circle x ^2 + y ^2 - 14x + 6y + 9 = 0 which passes through the point (2, 1).