The acos() method calculates the arccosine of a number.
The return value is between 0 and PI and is measured in radians.
If the return value is outside this range, 0 is returned.
<html> <body> <script language="JavaScript"> <!-- function doMath(){ var inputNum=document.form1.input.value; var result = Math.acos(inputNum); document.form1.answer.value = result; } --> </script> <form name=form1> This example calculates the arccosine of the number entered. <br><br> Enter Number: <input type="text" name="input" size=10> <input type="button" value="Calculate" onClick='doMath()'> <br> The arccosine is: <input type="text" name="answer" size=10> </form> </body> </html>
