Primitive of Reciprocal of Sine of a x/Logarithm of Tangent Form

Theorem

 * $\displaystyle \int \frac {\d x} {\sin a x} = \frac 1 a \ln \size {\tan \frac {a x} 2} + C$

Also see

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