• # Revision:Hyperbolic Functions

## Hyperbolic Functions

These are functions that have strong similarities to Trigonometric functions. They are combined functions of e^x and e^{-x}. They are called Hyperbolic Functions.

## Osborn's Rule

In a trigonometric identity you can replace each trigonometric function by the corresponding hyperbolic function to form the corresponding identity but you must change the sign of the every product of two sines.

For example

## Inverse Hyperbolic Functions and their logarithmic forms

As with trigonometric functions, you also get inverse hyperbolic functions. The function is the inverse function of the function .

is the positive root of previous quadratic equation. So we have:

From this we have

Similarly:

## Graphs of Inverse Hyperbolic Functions

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