1.

If sec^(-1)(1/(sqrt(1-x^(2))))+cot^(-1)((sqrt(1-x^(2)))/x)=sin^(-1)(k) then k=

Answer»

`xsqrt(1-x^(2))`
`2xsqrt(1-x^(2))`
`SQRT(1-x^(2))`
`2X`

ANSWER :B


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