Useful Trigonometric and Hyperbolic Formulae for Lorentz Transformations

Useful Trigonometric and Hyperbolic Formulae for Lorentz Transformations 

The trigonometric functions may be related to the exponential function via Euler s relation 

The inverse functions of the trigonometric functions (on suitably chosen domains) are denoted as arccos x, arcsin x, arctan x, and arccot x. Important relations between the trigonometric functions and/or their inverse functions are 

Similarly to the definition of the usual trigonometric functions, the hyperbolic functions are given by 

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C.3 Useful Trigonometric and Hyperbolic Formulae for Lorentz Transformations 647... 

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