Primitive of Reciprocal of Tangent of a x

Theorem

 * $\displaystyle \int \frac {\mathrm d x} {\tan a x} = \frac 1 a \ln \left\vert{\sin a x}\right\vert + C$

Also see

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


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


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


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


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