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If A=tan^-1((xsqrt3)/(2k-x)) and B=tan^-...

If A=`tan^-1((xsqrt3)/(2k-x))` and B=`tan^-1((2x-k)/(ksqrt3))` Then, `A-B` is equal to

A

`(pi)/(2)`

B

`(pi)/(3)`

C

`(pi)/(6)`

D

None of these

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