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acosh() function in PHP
The acosh() function returns the inverse hyperbolic cosine of the specified number.
Syntax
acosh(num)
Parameters
num − The number for which we want the inverse hyperbolic cosine.
Return
The acosh() function returns the inverse hyperbolic cosine of a number.
Example
<?php echo(acosh(1) . "<br>"); echo(acosh(1.60) . "<br>"); ?>
Output
0<br>1.0469679150032<br>
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