August 1999
Intermediate to advanced
1488 pages
72h 53m
English
Content preview from Pure JavaScript
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Math.acos()
JavaScript 1.0+, ECMAScript 1.0+, JScript 1.0+ Nav2+, NES2+, IE 3+, Opera3+ Syntax
math.acos(num)
Description
The acos() method of the Math object is used to calculate 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.
Example
Listing 6.152 shows how the acos() method is used and what values can be returned.
Listing 6.152 Example of How to Use acos()
<html> <body> <script language="JavaScript"> <!–– Hide // function calculates the arccosine of the input number function doMath(){ var inputNum=document.form1.input.value; var result = Math.acos(inputNum); document.form1.answer.value = result; } // End Hide ––> </script> <form ... |
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