float tanh(float $x);
<?Php echo tanh(0); // Output is 0 echo "<br>"; echo tanh(1); // Output 0.76159415595576 echo "<br>"; echo tanh(-1); // Output -0.76159415595576 echo "<br>"; echo tanh(4.2); // Output is 0.99955036645953 echo "<br>"; echo tanh(2); // Output is 0.96402758007582 echo "<br>"; echo tanh(90); // Output is 1 ?>
Plotting of SIN & SIN curves by using PHP GD function with deg2rad()
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