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05-25-2006, 02:13 PM

Xenium

Join Date: Apr 2006

Location: Manchester - UK

Posts: 26

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Yes. Arc tan is the inverse of tan for php.

But the return is in radians. So if you want it in degrees, you will need to use rad2deg.

E.G.

PHP Code:


			
$F = SQRT(rad2deg(atan($A/2)));

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