Home >Web Front-end >JS Tutorial >Detailed explanation of the use of acos() method in JavaScript_Basic knowledge
This method returns the arc cosine of radians. The ACOS method returns the value of 0 and PI for radians between x-1 and 1. If the number value is outside this range, NaN is returned.
Grammar
Math.acos( x ) ;
Here are the details of the parameters:
Return value:
Example:
<html> <head> <title>JavaScript Math acos() Method</title> </head> <body> <script type="text/javascript"> var value = Math.acos(-1); document.write("First Test Value : " + value ); var value = Math.acos(null); document.write("<br />Second Test Value : " + value ); var value = Math.acos(30); document.write("<br />Third Test Value : " + value ); var value = Math.acos("string"); document.write("<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