Q.Let P(a sec θ, b tan θ) and Q (a sec φ, b tan φ), where 2 π θ + φ = θ + φ = θ + φ = θ + φ = be two points on the hyperbola 2 2 x y a b − − = 1. If (h, k) is the point of intersection of the normal at P and Q then k is equal to
Correct answer: 2 b + 2 -(a) b