JavaScript - Math cos Method

Description

This method returns the cosine of a number. The cos method returns a numeric value between -1 and 1, which represents the cosine of the angle.

Syntax

Its syntax is as follows −

Math.cos( x ) ;

Parameter Details

x − A numbers.

Return Value

Returns the cosine of a number.

Example

Try the following example program.

Live Demo

<html>   
   <head>
      <title>JavaScript Math cos() Method</title>
   </head>
   
   <body>      
      <script type = "text/javascript">
         var value = Math.cos(90);
         document.write("First Test Value : " + value ); 
         
         var value = Math.cos(30);
         document.write("<br />Second Test Value : " + value ); 
         
         var value = Math.cos(-1);
         document.write("<br />Third Test Value : " + value ); 
         
         var value = Math.cos(2*Math.PI);
         document.write("<br />Fourth Test Value : " + value ); 
      </script>      
   </body>
</html>

Output

First Test Value : -0.4480736161291702
Second Test Value : 0.15425144988758405
Third Test Value : 0.5403023058681398
Fourth Test Value : 1

javascript_math_object.htm