## Calculus: Early Transcendentals (2nd Edition)

$\frac{d}{dx}(ln|\sin(x)|) =\cot(x)$
Using Chain Rule: $\frac{d}{dx}(\ln|\sin(x)|) = \cos(x)*\frac{1}{\sin(x)} = \frac{\cos(x)}{\sin(x)} = \cot(x)$