DLMF:4.21.E22
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Math Formula Information
Formula: Failed to parse (syntax error): {\displaystyle \cos@@{\frac{z}{2}}=\pm\left(\frac{1+\cos@@{z}}{2}\right)^{1/2},}
Name: DLMF:4.21.E22
Description:
Data Source
https://lct.wmflabs.org/w/index.php?title=Special:EntityPage/Q1724