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JavaScript中的Math.sin()方法使用詳解，javascriptmath.sin
這個方法返回一個數位正弦。sin方法返回-1到1之間的數值，它表示參數的正弦值。
文法
Math.sin( x ) ;
下面是參數的詳細資料：
傳回值:
例子：
<html><head><title>JavaScript Math sin() Method</title></head><body><script type="text/javascript">var value = Math.sin( 0.5 );document.write("First Test Value : " + value ); var value = Math.sin( 90 );document.write("<br />Second Test Value : " + value ); var value = Math.sin( 1 );document.write("<br />Third Test Value : " + value ); var value = Math.sin( Math.PI/2 );document.write("<br />Fourth Test Value : " + value ); </script></body></html>
這將產生以下結果：
First Test Value : 0.479425538604203Second Test Value : 0.8939966636005578Third Test Value : 0.8414709848078965Fourth Test Value : 1
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