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If cosx/(1 + cosec x)+ (cosx)/(cosecx -1...

If `cosx/(1 + cosec x)+ (cosx)/(cosecx -1) =2`, which one of the following in one of the value ofx ?

A

`pi//2`

B

`pi//3`

C

`pi//4`

D

`pi//6`

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