Definition: The Cosh () function in PHP is used to find the hyperbolic cosine. Cosh (x) will give you the hyperbolic cosine of x, which can also be calculated as exp(x) + exp(-x))/2, where exp(x) is e raised to the power of x.
Also Known As: Hyperbolic Cosine
Examples:
<?php
echo(cosh(1) . "<br />");
echo((exp(1) + exp(-1))/2 . "<br />");
echo(cosh(0) . "<br />");
echo(cosh(-1) . "<br />");
?>
This will return the results:
1.5430806348152
1.5430806348152
1
1.5430806348152
