Elective Courses

PHP Math Function

Course Recommendation:

PHP cos() Function

Definition and Usage

The cos() function returns the cosine of a number.xSyntax
cos( )
x Parameter

Description

cos() returns the parameter x cosine value. x is in radians.

Tips and Comments

Note:The value returned by cos() is between -1 and 1.

Example

In this example, we will calculate the cosine of different values:

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

Output:

-0.9899924966004454
-0.9899924966004454
1
-1
1

PHP Math Function