1.

int (1)/(2 + 3 cos x) dx =

Answer»

`(1)/(sqrt(5))log |(sqrt(5) + TAN""(x)/(2))/(sqrt(5) -tan""(x)/(2)) |`+ c
`(1)/(sqrt(3)) log |(sqrt(3)+ tan""(x)/(2))/(sqrt(3) - tan""(x)/(2)) | + c`
`(1)/(sqrt(5)) log |(sqrt(3)+ tan""(x)/(2))/(sqrt(5) - tan""(x)/(2)) | + c`
`(2)/(sqrt(5)) log |(SQRT5)+ tan""(x)/(2))/(sqrt(5) - tan""(x)/(2)) | + c`

Answer :A


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