JavaScript - Math tan Method

Description

This method returns the tangent of a number. The tan method returns a numeric value that represents the tangent of the angle.

Syntax

Its syntax is as follows −

Math.tan( x ) ;

Parameter Details

x − A number representing an angle in radians.

Return Value

Returns the tangent of a number.

Example

Try the following example program.

Live Demo

<html>   
   <head>
      <title>JavaScript Math tan() Method</title>
   </head>
   
   <body>      
      <script type = "text/javascript">
         var value = Math.tan( -30 );
         document.write("First Test Value : " + value ); 
         
         var value = Math.tan( 90 );
         document.write("<br />Second Test Value : " + value ); 
         
         var value = Math.tan( 45 );
         document.write("<br />Third Test Value : " + value ); 
         
         var value = Math.tan( Math.PI/180 );
         document.write("<br />Fourth Test Value : " + value ); 
      </script>      
   </body>
</html>

Output

First Test Value : 6.405331196646276
Second Test Value : -1.995200412208242
Third Test Value : 1.6197751905438615
Fourth Test Value : 0.017455064928217585

javascript_math_object.htm