If the focal chord of the ellipse `x^2/a^2+y^2/b^2= 1,` is normal at `(acostheta, bsintheta)` then eccentricity of the ellipse is

If the ellipse x^2/a^2+y^2/b^2=1 (b > a) and the parabola y^2 = 4ax cut at right angles, then eccentricity of the ellipse is

The equation of the normal to the curve x^2/a^2+y^2/b^2=1 at (acostheta,bsintheta) is

The equation of the normal to the curve x^2/a^2+y^2/b^2=1 at (acostheta,bsintheta) is

The eccentricity of the ellipse 5x^(2)+9y^(2)=1 is

Length of the focal chord of the ellipse x^2/a^2+y^2/b^2= 1 which is inclined to the major axis at angle theta is

The eccentricity of the ellipse (x^2)/25+(y^2)/9=1 is ,

Show that the line (ax)/(3)+(by)/(4)=c be a normal to the ellipse (x^2)/(a^2)+(y^2)/(b^2)=1 , When 15c=a^(2)e^(2) where e is the eccentricity of the ellipse.

The eccentricity of the ellipse 5x^(2) + 9y^(2) = 1 is _

The locus of mid-points of a focal chord of the ellipse x^2/a^2+y^2/b^2=1