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If cos(cot^(-1)(1/2))=cot(cos^(-1)x), th...

If `cos(cot^(-1)(1/2))=cot(cos^(-1)x)`, then a value of x is

A

`(1)/(sqrt(6))`

B

`(-1)/(sqrt(12))`

C

`(2)/(sqrtq(6))`

D

`(-2)/(sqrt(6))`

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