Mid point of a chord lies on the director circle for a conic then which of the following canbe the value of the eccentricity of the conic is

A chord is drawn to a conic section and its mid point lie one the director circle of the conic which of the following cannot be its eccentricity a. sin^2theta b. tan^2theta c. cos e c^2theta d. sec^2theta-tan^2theta+1

The eccentricity of the conic 4x^2-9y^2=2 is :

The eccentricity of the conic 9x^2-16y^2=144 is:

The eccentricity of the conic x ^(2) -4y ^(2) =1 is

The eccentricity of the conic x ^(2) -4y ^(2) =1 is

What is the eccentricity of the conic 4x^(2)+9y^(2)=144 ?