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Wallis Sine Formula


\begin{displaymath}
\int^{\pi /2}_0 \sin^n x\,dx = \cases{
{\pi\over 2} {1\cdot...
...-1)\over 1\cdot 3\cdot 5\cdots n} & for $n = 3$, 5, \dots.\cr}
\end{displaymath}

See also Wallis Cosine Formula, Wallis Formula




© 1996-9 Eric W. Weisstein
1999-05-26