cos
Name
cos — Returns the cosine for the given
radians value.
Synopsis
float cos
(radians);
float radians: Radians
value
Returns
Cosine of a value
Description
Returns the cosine of the value given by radians , which as its name suggests is
to be given in radians.
Example
Example 668. Calculate the
cosine of a value
$rad = pi() / 2;
echo "The cosine of $rad = ", cos($rad);
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
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