1.

int (sin x.cos x)/(cos^(2) x + 3 cos x + 2)dx =

Answer»

`log"" ((COS X + 2)^(2))/(| cos x + 1|) + C `
`log |(cos x + 2)/( cos x + 1)| + c `
log`(|1 + cos x |)/((2 + cos x)^(2)) + c`
`log |(1 + cos x)/(2 + cos x)| +c `

ANSWER :C


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