Cos

Returns the cosine of a given angle in radians.

Syntax

Cos(number)

number

Angle in radians for which you want the cosine.

Usage

The range of the result is -1 to 1.

To convert degrees to radians, multiply degrees by /180. To convert radians to degrees, multiply radians by 180/.

Examples

<!--- This snippet shows how to use Cos --->
<HTML>
<HEAD>
<TITLE>
Cos Example
</TITLE>
</HEAD>

<BODY BGCOLOR=silver>
<H3>Cos Example</H3>

<!--- output its Cos value --->
<CFIF IsDefined("FORM.CosNum")>
    <CFIF IsNumeric(#FORM.CosNum#)>
        Cos(<CFOUTPUT>#FORM.CosNum#</CFOUTPUT>) = 
          <CFOUTPUT>#Cos(FORM.cosNum)# 
        radians = #Evaluate(Cos(FORM.cosNum) * 180/PI())#
          Degrees</CFOUTPUT>
    <CFELSE>
<!--- if it is empty, output an error message --->
        <H4>Please enter a number between -1 and 1</H4>
    </CFIF>
</CFIF>

<FORM ACTION="cos.cfm" METHOD="POST">
<P>Type in a number to get its cosine in Radians and Degrees
<BR><INPUT TYPE="Text" NAME="cosNum" size="25">
<P><INPUT TYPE="Submit" NAME=""> <INPUT TYPE="RESET">
</FORM>

</BODY>
</HTML>

CFML Language Reference
Chapter 2 : ColdFusion Functions