<!DOCTYPE html>
<html>
	

<head>
	
<body  bgcolor="#ffffff"  onLoad="document.form.input.focus()">

	
	
	 <SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function doit() {
form.input.value = eval(form.input.value)
}
function Cos() {
x = form.input.value
if (x == '') alert('Error: Input Required');
else form.input.value = Math.cos(x);
}
function Sin() {
x = form.input.value
if (x == '') alert('Error: Input Required');
else form.input.value = Math.sin(x);
}
function Ln() {
x = form.input.value
if (x == '') alert('E