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A and B are two fixed points and if the ...

A and B are two fixed points and if the vertex 'C' of `DeltaABC` moves such that `cot A + cot B =k`, then show that locus of 'C' is a line parallel to AB.

A

a line perpendicular AB

B

a line parallel to AB

C

a parabola

D

not a straight line

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The correct Answer is:
B
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