PHP tanh() Function

PHPServer Side ProgrammingProgramming

Definition and Usage

The tanh() function returns the hyperbolic tangent ratio of given angle in radians. In trigonometry, hyperbolic tangent ratio is defined as.

tanh(x) = sinh()/tanh()

This function returns a float value .

tanh ( float $arg ) : float Parameters Sr.NoParameter & Description 1arg A floating point value that represents angle in radians Return Values PHP tanh() function returns hyperbolic tangent ratio of given parameter. PHP Version This function is available in PHP versions 4.x, PHP 5.x as well as PHP 7.x. Example Live Demo Following example calculates tanh(pi/2) and returns 2.5091784786581 which is also the result of formula (ex + e-x))/2 − <?php$arg=M_PI_2;
$res=tanh($arg);
echo "tanh(pi) = " . $res . "\n"; echo "using formula = " . sinh($arg)/cosh($arg); ?> Output This will produce following result − tanh(pi) = 0.91715233566727 using formula = 0.91715233566727 Example Live Demo Following example uses deg2rad() function to convert degrees to radians and then uses tanh(60). Result is 0.78071443535927 − <?php$arg=deg2rad(60);
$val=tanh($arg);
echo "tanh(" . $arg . ") = " .$val;
?>

Output

This will produce following result −

tanh(1.0471975511966) = 0.78071443535927

Example

Live Demo

Let's check find out tanh(0). It returns 0 −

<?php
$arg=0;$val=tanh($arg); echo "tanh(" .$arg . ") = " . $val; ?> Output This will produce following result − tanh(0) = 0 Example Live Demo Following example computes tanh(pi) which is approximately equal to 0 <?php$arg=M_PI;
$val=tanh($arg);
echo "tanh(" . $arg . ") = " .$val;
?>

Output

This will produce following result −

tanh(3.1415926535898) = 0.99627207622075