JavaScript Tutorial/Math/cos
Math.cos()
The cos() method calculates the cosine of a number.
It returns a numeric value between -1 and 1, representing the cosine of an angle.
<source lang="javascript">
<html>
<body> <script language="JavaScript"> </script> <form name=form1> This exanple calculates the cosine of the entered number.
Enter First Number: <input type="text" name="input" size=10> <input type="button" value="Calculate" onClick="doMath()">
The cosine is: <input type="text" name="answer" size=10> </form> </body> </html></source>