JavaScript Math.asin() 函数详解与使用示例

语法结构

Math.asin( x ) ;

<html>
<head>
<title>JavaScript Math asin() Method</title>
</head>
<body>
<script type="text/javascript">

var value = Math.asin(-1);
document.write("First Test Value : " + value ); 
 
var value = Math.asin(null);
document.write("<br />Second Test Value : " + value ); 

var value = Math.asin(30);
document.write("<br />Third Test Value : " + value ); 

var value = Math.asin("string");
document.write("<br />Fourth Test Value : " + value ); 
</script>
</body>
</html>

First Test Value : -1.5707963267948965
Second Test Value : 0
Third Test Value : NaN
Fourth Test Value : NaN