note 79198 added to function.asinh
| From: | ape_cwb at yahoo dot com dot br | Date: | Thu, 15 Nov 2007 13:40:08 +0000 |
| Subject: | note 79198 added to function.asinh | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-132296@lists.php.net to get a copy of this message | ||
The correct implementation of asinh(x) for Windows plataform is:
-------------------------------------------------------
function asinh($x)
{
return ln($x + sqrt(1 + pow($x, 2)));
}
function ln($x)
{
return $x = log($x)/log(M_E);
}
--------------------------------------------------------
The worksheet above includes a comparation about the native asinh(x) and the implemented version
using LN and LOG (like Snoyes posted on 27-Dec-2005 07:42)
http://www.mavadesign.com.br/allan/asinh(x).xls
This implementation using LN, give THE SAME results that function asinh(x) linux native.
Allan Patrick Engel
Curitiba - Paraná - Brasil
----
Server IP: 69.147.83.197
Probable Submitter: 201.11.40.168
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Manual Page -- http://www.php.net/manual/en/function.asinh.php
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Del: in docs -- https://master.php.net/note/delete/79198/in+docs
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