If `x^2/a^2+y^2/b^2=1(a>b)` and `x^2-y^2=c^2` cut at right angles, then:

If x^2/a^2+y^2/b^2=1(a gt b) and x^2-y^2=c^2 cut at right angles , then :

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

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 (a) (3)/(5) (b) (2)/(3) (c) (1)/(sqrt(2)) (d) (1)/(2)

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

If the curves y^(2) = 16x and 9x^(2)+by^(2) =16 cut each other at right angles, then the value of b is

If the curves (x^(2))/(a)+(y^(2))/(b)=1 and (x^(2))/(c )+(y^(2))/(d)=1 intersect at right angles then prove that a-b=c-d

If the chords of contact of tangents fromtwo points (x_1,y_1) and (x_2,y_2) to the hyperbola x^2/a^2-y^2/b^2=1 are at right angles, then (x_1x_2)/(y_1y_2) is equal to (a) a^2/(-b^2) (b) b^2/(-a^2) (c) b^4/(-a^4)

if two curves C_(1):x=y^(2) and C_(2):xy=k cut at right angles,then value of k is :