# 3.5.1.2.30 Tanh

## Desctription

The tanh(x) function is the hyperbolic form of and tan(x).

## Syntax

double tanh(double x)

## Parameters

x

x is any real number. Note that numbers whose absolute value is greater than about 710 return 1/-1.

## Return

Returns the hyperbolic tangent of x.

## Example

val = tanh(10); // val will have a value of ~0.99999999587769