If is a tangent to the ellipse for some then the distance between the foci of the ellipse is:
Explanation for correct option:
Step:1 Calculate the tangent to the ellipse and then compare it with the given equation.
Here, the given equation of the ellipse is .
The tangent to the ellipse is .
Given, the tangent to the ellipse is:
Step:2 Calculate the value of and
Again,
We know,
Step:3 Calculate the distance between the foci of the given ellipse
the distance between foci
Hence, Option (B) is the correct answer.