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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

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