Php atanh
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PHP function atanh
This function returns the reverse hyperbolic tangent of X, and X is the value of hyperbolic tangent.
Syntax atanh
X is the value of hyperbolic tangent.
atanh(X);
Example 1
<?php echo atanh(1/2); echo "<br/>"; echo atanh(-1/2); ?>
Output
0.54930614433405 -0.54930614433405
