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If x^2-2p x y-y^2=0 and x^2-2q x y-y^2=0...

If `x^2-2p x y-y^2=0` and `x^2-2q x y-y^2=0` bisect angles between each other, then find the condition.

A

`2p+q=0`

B

`pq+1=0`

C

`2p+3q=0`

D

`pq=1`

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The correct Answer is:
B
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