1.

If I_(1) int sin^(-1) ((2x)/(1 +x^(2)) )dx , I_(2) = int cos^(-1) ((1-x^(2))/(1 +x^(2)) )dx , I_(3) = int tan^(-1) ((2x)/(1 - x^(2)) )dx , then I_(1) + I_(2) - I_(3)=

Answer»

`2X tan^(-1) " X- log " ( 1 + x^(2)) + C `
`2 [ "XTAN"^(-1) x - log (1 + x^(2)) ] + c `
`2"xtan"^(-1) "x + log " ( 1 + x^(2)) + c `
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Answer :A


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