User Guide
296 CFML Language Reference
Cos
Returns the cosine of a given angle in radians.
See also Sin, Tan, and Pi.
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 π/180. To convert radians to
degrees, multiply radians by 180/π.
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>