DLMF:4.21.E9
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Math Formula Information
Formula: Failed to parse (syntax error): {\displaystyle \cos@@{u}-\cos@@{v}=-2\sin@{\frac{u+v}{2}}\sin@{\frac{u-v}{2}}.}
Name: DLMF:4.21.E9
Description:
Data Source
https://lct.wmflabs.org/w/index.php?title=Special:EntityPage/Q1711