EllipseMedium
Question
If p and p′ denote the lengths of the perpendicular from a focus and the centre of an ellipse with semi-major axis of length a, respectively, on a tangent to the ellipse and r denotes the focal distance of the point, then
Options
A.ap = rp′
B.rp = ap′
C.ap = rp′ + 1
D.ap′ = rp = 1
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