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PHP cos () function

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Examples

Returns the number of different cosines:

<?php
echo(cos(3) . "<br>");
echo(cos(-3) . "<br>");
echo(cos(0) . "<br>");
echo(cos(M_PI) . "<br>");
echo(cos(2*M_PI));
?>

Running instance »

Definition and Usage

cos () function returns the cosine of a number.

Note: cos () function returns a number between -1 and 1, representing the cosine of the angle.


grammar

cos( number );

参数 描述
number 必需。规定一个数。

technical details

return value: number of cosine.
Return type: Float
PHP version: 4+


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