DLMF:4.21.E19

MaRDI QIDQ1923

• Label: DLMF:4.21.E19

Digital Library of Mathematical Functions ID 4.21.E19

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

Symbols List

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

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