Get your own PHP server Result Size: 625 x 565
x
 
<!DOCTYPE html>
<html>
<body>
<?php
echo(tanh(M_PI_4) . "<br>");
echo(tanh(0.50) . "<br>");
echo(tanh(-0.50) . "<br>");
echo(tanh(5) . "<br>");
echo(tanh(10) . "<br>");
echo(tanh(-5) . "<br>");
echo(tanh(-10));
?>
</body>
</html>
0.65579420263267
0.46211715726001
-0.46211715726001
0.9999092042626
0.99999999587769
-0.9999092042626
-0.99999999587769