DLMF:4.28.E2
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Math Formula Information
Formula: Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \cosh@@{z}=\frac{e^{z}+e^{-z}}{2},}
Name: DLMF:4.28.E2
Description:
Data Source
https://lct.wmflabs.org/w/index.php?title=Special:EntityPage/Q1839