If -1 < x <1, then 2tan-1 x = ?(a) sin-1 2x/(1 + x2)(b) sin-1 2x/(1 -� – InterviewSolution

1.	If -1 < x <1, then 2tan-1 x = ?(a) sin-1 2x/(1 + x2)(b) sin-1 2x/(1 - x2)(c) sin-1 (1 - x2)/(1 + x2)(d) sin-1 (1 + x2)/(1 - x2)
Answer» Answer is (a) sin^-1 2x/(1 + x²)

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