The domain of f(x) =cos ^(-1) (sec (co...

The domain of f(x) `=cos ^(-1) (sec (cos ^(-1) x)) + sin ^(-1) ( cosec( sin ^(-1) x)) ` is

A

`(-1, 1)`

B

`{-1, 1}`

C

`[-1, 1]`

D

`phi`

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The correct Answer is:

B

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