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Let,C be the centre of the hyperbola x^2/a^2 - y^2/b^2 = 1. The tangent at any point P on this hyperbola meets the

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Let,C be the centre of the hyperbola x2/a2 - y2/b2 = 1. The tangent at any point P on this hyperbola meets the straight lines bx -ay =0 and bx + ay =0 at the points Q and -R,respectively. Then,CQ.CR is equal to

(a) a2 - b2 

(b) a2 + b2 

(c) 1/a2 + 1/b2 

(d) 1/a2 - 1/b2 

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Correct Option (b) a2 + b2 

Explanation:

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