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Leibniz Series

The Series for the Inverse Tangent,

\begin{displaymath}
\tan^{-1} x=x-{\textstyle{1\over 3}} x^3+{\textstyle{1\over 5}} x^5+\ldots.
\end{displaymath}




© 1996-9 Eric W. Weisstein
1999-05-26