Primitive of Reciprocal of Cotangent of a x

Theorem

 * $\ds \int \frac {\d x} {\cot a x} = \frac {-\ln \size {\cos a x} } a + C$

Also see

 * Primitive of $\dfrac 1 {\sin a x}$


 * Primitive of $\dfrac 1 {\cos a x}$


 * Primitive of $\dfrac 1 {\tan a x}$


 * Primitive of $\dfrac 1 {\sec a x}$


 * Primitive of $\dfrac 1 {\csc a x}$