Answer
$ln|\sin(x)+1|+C$
Work Step by Step
$\int \frac{cos(x)}{sin(x)+1}dx$
let $u=sin(x)+1$
$dx=\frac{1}{cos(x)}du$
$\int \frac{cos(x)}{sin(x)+1}dx$
$=\int \frac{1}{u}du$
$=ln|u|+C$
$=ln|sin(x)+1|+C$
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