PHP cosh() Function

Return the hyperbolic cosine of different numbers:

<?php
echo(cosh(3) . "<br>");
echo(cosh(-3) . "<br>");
echo(cosh(0) . "<br>");
echo(cosh(M_PI) . "<br>");
echo(cosh(2*M_PI));
?>

Definition and Usage

The cosh() function returns the hyperbolic cosine of a number (equivalent to (exp(number) + exp(-number)) / 2).

cosh( number);

Parameter	Description
number	Required. Specifies a number

Return Value:	The hyperbolic cosine of number
Return Type:	Float
PHP Version:	4.1+