Formula:2251

Digital Library of Mathematical Functions ID 4.35.E11

${\displaystyle{\displaystyle{\cosh^{2}}z-{\sinh^{2}}z=1,}}$

Symbols List

• ${\displaystyle{\displaystyle\cosh\NVar{z}}}$: hyperbolic cosine function
• ${\displaystyle{\displaystyle\sinh\NVar{z}}}$: hyperbolic sine function
• ${\displaystyle{\displaystyle z}}$: complex variable
 

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