can-someone-please-show-how-to-get-0-pi-sin-a-sin-x-dx-piH-0-a-where-H-0-a-is-the-Struve-H-Function-

Question Number 108076 by Sarah85 last updated on 14/Aug/20

can someone please show how to get

\underset{0}{\int^{π}} \sin (a \sin (x)) d x = π H_{0} (a)

where H_{0} (a) is the Struve - H - Function