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PHP acosh() Function

PHP Math Reference Manual

Example

Returns the inverse hyperbolic cosine of different numbers:


Definition and Usage

The acosh() function returns the inverse hyperbolic cosine of a number.


Syntax

Parameter Description
number Required. Specifies a number.

Technical Details

Return Value: The inverse hyperbolic cosine of the number.
Return Type: Float
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PHP Version: 4.1+
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PHP Changelog: PHP 5.3: The acosh() function is available on all platforms.
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