DLMF:4.21.E16

MaRDI QIDQ1917

• Label: DLMF:4.21.E16

Digital Library of Mathematical Functions ID 4.21.E16

${\displaystyle{\displaystyle 2\cos u\cos v=\cos\left(u-v\right)+\cos\left(u+v\right),}}$

Symbols List

• ${\displaystyle{\displaystyle\cos\NVar{z}}}$: cosine function
 

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