1.

Let P(a sec theta,b tan theta) and Q(a sec varphi, b tan varphi)where theta+varphi=(pi)/(2) be two points on the hyperbola(x^(2))/(a^(2))-(y^(2))/(b^(2))=1 . If (h, k) is the point of intersection of the normals at P and Q, then k=

Answer»

`(a^(2)+B^(2))/(2)`
`-((a^(2)+b^(2))/(a))`
`(a^(2)+b^(2))/(b)`
`-((a^(2)+b^(2))/(b))`

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