1.

int(1)/(1+cos^(2)x)dx=.....

Answer»

`(1)/(sqrt(2))tan^(-1)(TANX)+c`
`(1)/(sqrt(2))tan^(-1)((1)/(2)tanx)+c`
`(1)/(sqrt(2))tan^(-1)((1)/(sqrt(2))tanx)+c`
NONE of these

Answer :C


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