PHP sinh() Function

The PHP sinh() function returns hyperbolic sine of a value. The hyperbolic sine of x is defined as:

where e is an Euler's number.

In special cases it returns the following:

• If the argument is NAN, then the result is NAN.
• If the argument is infinite, then the result is an infinity with the same sign as the argument.

Syntax

sinh(number)

Parameters

Return Value

Returns the hyperbolic sine of a value.

Example:

In the example below, sinh() function is used to find out the hyperbolic sine of a value.

<?php
echo "sinh(-2) = ".sinh(-2)."\n";
echo "sinh(-1) = ".sinh(-1)."\n";
echo "sinh(0) = ".sinh(0)."\n";
echo "sinh(1) = ".sinh(1)."\n";
echo "sinh(2) = ".sinh(2)."\n";
echo "sinh(INF) = ".sinh(INF)."\n";
echo "sinh(-INF) = ".sinh(-INF)."\n";
echo "sinh(NAN) = ".sinh(NAN)."\n";
?>

The output of the above code will be:

sinh(-2) = -3.626860407847
sinh(-1) = -1.1752011936438
sinh(0) = 0
sinh(1) = 1.1752011936438
sinh(2) = 3.626860407847
sinh(INF) = INF
sinh(-INF) = -INF
sinh(NAN) = NAN