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PHP atanh() Function

PHP atanh() Function

PHP atanh() function is used to find the inverse hyperbolic tangent of the given input number passed to it as an argument. It accepts only a single parameter $number which is the number whose inverse hyperbolic tangent value is to be found. The value of this input parameter should be in radians. It returns a floating point number as output which is the inverse hyperbolic tangent value of the input number passed to it as argument.

Syntax:

  atanh($number);

Parameter Values

Parameter Description
number This is a required parameter. This parameter defines the given input number.

Here is an example of atanh() function in PHP:

<html>
<body>

<?php

echo atanh(M_2_PI)."<br>";
echo atanh(0.79)."<br>";
echo atanh(-0.79)."<br>";

?>

</body>
</html>
Output:
0.75246926714193
1.0714316840587
-1.0714316840587

Here is an another example of atanh() function in PHP:

<html>
<body>

<?php

echo atanh(0)."<br>";
echo atanh(1)."<br>";
echo atanh(-1)."<br>";
echo atanh(0.524)."<br>";
echo atanh(0.785)."<br>";
echo atanh(6.283)."<br>";

?>

</body>
</html>
Output:
0
INF
-INF
0.58183794100759
1.058267833043
NAN