atan
Name
atan — Returns the calculated arctangent for the
given argument.
Synopsis
float atan
(x);
float x: Base value
Returns
Arctangent as a float
Description
atan() calculates the arctangent for a single
value.
Example
Example 663. Calculate the
arctangent for a value
$tan = 10.0;
echo "The arctangent of $tan is ", atan($tan);
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
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