cos() function in PHP

Thecos()The function returns the cosine value of a number. The return value is between-1and1The numbers between indicate the cosine of the angle.

Syntax

cos(num)

parameter

• num-the specified value in radians

returns

Thecos()the function returns the cosine value as a floating-point number. The return value is between-1and1The numbers between indicate the cosine of the angle.

Example

<?php
　　　echo(cos(1)) . "<br>";
　　　echo(cos(-1));
?>

Output Result

0.54030230586814<br>0.54030230586814

Example

Let's look at another example-

<?php
　　　echo(cos(0));
?>

Output Result

1