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If the pair of lines \(x^2 - 2pxy - y^2 = 0\) and  \(x^2 - 2qxy - y^2 = 0\) are such that each pair bisects the angle between the other pair, then pq equals.

(a) \(-1 \)

(b) 0

(c) 1

(d) 2

Asked By Arshad Hussain

Updated Wed, 10 Oct 2018 11:31 am

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