Let P(asecθ,btanθ)and Q(asec∅,btan∅)where θ+∅=pi/2, be two points on the hyperbola x2/a2−2/b2=1. If (h,k) is the point of intersection of normals at P and Q, then k is equal to ?
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Solution
The equation of parabola is
the equation of the normal at a point p(asecθ,btanθ) is given as
the equation of the normal at a point q(asecФ,btanФ) is given by