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.
Its syntax is as follows −
Math.cos( x ) ;
x − A numbers.
Returns the cosine of a number.
Try the following example program.
<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>
First Test Value : -0.4480736161291702 Second Test Value : 0.15425144988758405 Third Test Value : 0.5403023058681398 Fourth Test Value : 1