Syntax of cosh in PHP
float cosh(float value)
Returns the hyperbolic cosine of value.
Example of cosh
<?php
echo(cosh(3) . "<br>");
echo(cosh(-3) . "<br>");
echo(cosh(0) . "<br>");
echo(cosh(M_PI) . "<br>");
echo(cosh(2*M_PI));
?>
10.067661995778
10.067661995778
1
11.591953275522
267.74676148375