Definition: The tanh () PHP Function is used to find the hyperbolic tangent of the imputed number. So tanh (x) would return the hyperbolic tangent of x, or sinh (x)/cosh(x). This will produce a curve who's inverse is the arc hyperbolic tangent.
Also Known As: hyperbolic tangent
Examples:
<?php
echo(tanh(1) . "<br />");
echo(tanh(0) . "<br />");
echo(tanh(-1) . "<br />");
?>
This would give the results:
0.76159415595576
0
-0.76159415595576
