1.

If -1 lt x lt 0," then "cos^(-1)x is equal to

Answer»

`"sec"^(-1)1/x`
`PI-sin^(-1)sqrt(1-x^(2))`
`pi+"tan"^(-1)(sqrt(1-x^(2)))/x`
`"cot"^(-1)x/(sqrt(1-x^(2)))`

ANSWER :A::B::C::D


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