Calculate the cosine of a number in JavaScript
Description
The following code shows how to calculate the cosine of a number.
Example
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function doMath() {<!-- w w w . j a va 2 s.c o m-->
var inputNum = document.form1.input.value;
var result = Math.cos(inputNum);
document.form1.answer.value = result;
}
</script>
</head>
<body>
<form name=form1>
<br> Enter First Number:
<input type="text" name="input" size=10>
<input type="button" value="Calculate" onClick='doMath()'>
<br>
The cosine is: <input type="text" name="answer" size=10>
</form>
</body>
</html>