1.

If 1/2tan^(-1)((2x)/(x^(2)-1))+"cos"^(-1)(x^(2)-1)/(x^(2)+1)=(2pi)/3 then x=

Answer»

`2-SQRT(3)`
`sqrt(3)-sqrt(2)`
`2+sqrt(3)`
`+sqrt(3)`

ANSWER :A


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