Primitive of Square of Secant of a x over Tangent of a x

Theorem

 * $\ds \int \frac {\sec^2 a x \rd x} {\tan a x} = \frac 1 a \ln \size {\tan a x} + C$

Also see

 * Primitive of $\dfrac {\csc^2 a x } {\cot a x}$