The ordinary double angle formulae of trigonometry have analogous results for the hyperbolic trigonometric functions:
Trigonometric Formulae | Hyperbolic Trigonometric Formulae |
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The Formulae can be proved using the definitions
and
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The ordinary double angle formulae of trigonometry have analogous results for the hyperbolic trigonometric functions:
Trigonometric Formulae | Hyperbolic Trigonometric Formulae |
|
|
|
|
|
|
|
|
|
|
The Formulae can be proved using the definitionsand