acosh

(PHP 4 >= 4.1.0, PHP 5)

acoshInverse hyperbolic cosine

Опис

float acosh ( float $arg )

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

Параметри

arg

The value to process

Значення, що повертаються

The inverse hyperbolic cosine of arg

Журнал Змін

Версія Опис
5.3.0 This function is now available on all platforms

Прогляньте Також

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User Contributed Notes 1 note

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rahmatjon at gmail dot com
1 year 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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