sinh(): Hyperbolic sine

float sinh(float $x);

<?Php
echo sinh(0); // Output is 0
echo "<br>";
echo sinh(1); // Output  1.1752011936438
echo "<br>";
echo sinh(-1); // Output -1.1752011936438
echo "<br>";
echo sinh(4.2); // Output is 33.335667732052
echo "<br>";
echo sinh(2); // Output is 3.626860407847
echo "<br>";
echo sinh(90); // Output is 6.1020164715892E+38
?>

Plotting of SIN & SIN curves by using PHP GD function with deg2rad()