srand
To find cotangent you can use
tan (M_PI/2 - $alfa)
tan
(PHP 4, PHP 5)
tan — Tangent
Description
float tan
( float $arg
)
tan() returns the tangent of the arg parameter. The arg parameter is in radians.
Parameters
- arg
-
The argument to process in radians
Return Values
The tangent of arg
Examples
Example #1 tan() example
<?php
echo tan(M_PI_4); // 1
?>
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