Formula:1939

Digital Library of Mathematical Functions ID 4.21.E27

${\displaystyle{\displaystyle\sin\left(2z\right)=2\sin z\cos z=\frac{2\tan z}{1+{\tan^{2}}z},}}$

Symbols List

• ${\displaystyle{\displaystyle\cos\NVar{z}}}$: cosine function
• ${\displaystyle{\displaystyle\sin\NVar{z}}}$: sine function
• ${\displaystyle{\displaystyle\tan\NVar{z}}}$: tangent function
• ${\displaystyle{\displaystyle z}}$: complex variable
 

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