The inverse cosine value of the radian returned by this method. The ACOS method returns the numerical value of 0 and PI for the radian between x-1 and 1. If the value of the number is outside this range, NaN is returned.
grammar
( x ) ;
The following are the detailed information of the parameters:
- x: a number
Return value:
- Returns the inverse cosine value of some radians.
example:
<html>
<head>
<title>JavaScript Math acos() Method</title>
</head>
<body>
<script type="text/javascript">
var value = (-1);
("First Test Value : " + value );
var value = (null);
("<br />Second Test Value : " + value );
var value = (30);
("<br />Third Test Value : " + value );
var value = ("string");
("<br />Fourth Test Value : " + value );
</script>
</body>
</html>
This will produce the following results:
First Test Value : 3.141592653589793 Second Test Value : 1.5707963267948965 Third Test Value : NaN Fourth Test Value : NaN