Calculate the integration : $$ I=\int_0^{\pi/2}\sin^{a-1}\phi\cos^{b-1}\phi\,d\phi $$ I need help about this! Please!
2026-03-26 08:04:12.1774512252
Beta function integration
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Hint:
Understand the connection between
$$\sin^{a-1}(\phi)\cos^{b-1}(\phi)$$
and
$$t^{p-1}(1-t)^{q-1}.$$