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If: cotx + cot(pi/4 +x)=2, then: x=...

If: `cotx + cot(pi/4 +x)=2`, then: x=

A

`2npi +- pi/6`

B

`2npi +- pi/3`

C

`npi +- pi/3`

D

`npi +- pi/6`

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The correct Answer is:
D
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