Php acosh
From w3cyberlearnings
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PHP function acosh
This function returns the reverse hyperbolic cosine of a input hyperbolic cosine number.
Syntax acosh
X is a number input
acosh(X);
Example 1
<?php echo acosh(3); echo "<br/>"; echo acosh(45); ?>
Output
1.7627471740391 4.4996861906715
