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