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Introduction to the use of Math.cos() cosine method in JavaScript_Basic knowledge

WBOY
WBOYOriginal
2016-05-16 15:55:151416browse

This method returns the cosine of a number. The cosine method returns a number between -1 and 1 that represents the cosine of the angle.
Grammar

Math.cos( x ) ;

Here are the details of the parameters:

  • x : a number.

Return value:

Returns the cosine of a number.
Example: 

<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>

This will produce the following results: 

First Test Value : -0.4480736161291701
Second Test Value : 0.15425144988758405
Third Test Value : 0.5403023058681398
Fourth Test Value : 1

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