Primitive of Reciprocal of Root of a squared minus x squared/Examples

Examples of Use of Primitive of $\dfrac 1 {\sqrt {a^2 - x^2} }$

Primitive of $\dfrac 1 {\sqrt {16 - x^2} }$

$\ds \int \dfrac 1 {\sqrt {16 - x^2} } \rd x = \arcsin \dfrac x 4 + C$