PHP 8.1.0 RC 2 available for testing

acosh

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

acoshInverse hyperbolic cosine

Açıklama

acosh(float $num): float

Returns the inverse hyperbolic cosine of num, i.e. the value whose hyperbolic cosine is num.

Değiştirgeler

num

The value to process

Dönen Değerler

The inverse hyperbolic cosine of num

Ayrıca Bakınız

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User Contributed Notes 1 note

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rahmatjon at gmail dot com
8 months ago
Hello!
There is no any example for acosh() function. Please put this one below the acosh() function's description.
Thank you!

Example:
<?php
    $x
= 1;
   
$y1 = acosh($x);
    echo
"PHP function acosh(). acosh(" . $x . ") = " . $y1 . ".<br/>";
   
$y2 = log($x + sqrt($x*$x -1));
    echo
"By definition of acosh. acosh(" . $x . ") = " . $y2 . ".<br/>";

   
$x = 10;
   
$y1 = acosh($x);
    echo
"PHP function acosh(). acosh(" . $x . ") = " . $y1 . ".<br/>";
   
$y2 = log($x + sqrt($x*$x -1));
    echo
"By definition of acosh. acosh(" . $x . ") = " . $y2 . ".<br/>";
?>
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