Return the inverse hyperbolic cosine of different numbers:
The acosh() function returns the inverse hyperbolic cosine of a number.
Parameter | Description |
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number | Required. Specifies a number |
Return Value: | The inverse hyperbolik cosine of number |
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Return Type: | Float |
PHP Version: | 4.1+ |
PHP Changelog: | PHP 5.3: acosh() is now available on all platform |