If two points are taken on minor axis of an ellipse at the same distance from the centre and the foci, the sum of the squares of the perpendiculars from these points on any tangent to the ellipse if a>b is
OS = ae
where m is a parameter.
Now sum of the squares of perpendiculars on this tangent
from the points S1 & S1′ is
Study 40% syllabus and score up to 100% marks in JEE