Primitive of Arcsine of x over a over x

Also see

 * Primitive of $\dfrac {\arccos \dfrac x a} x$


 * Primitive of $\dfrac {\arctan \dfrac x a} x$


 * Primitive of $\dfrac {\operatorname{arccot} \dfrac x a} x$


 * Primitive of $\dfrac {\operatorname{arcsec} \dfrac x a} x$


 * Primitive of $\dfrac {\operatorname{arccsc} \dfrac x a} x$