<!--- This example shows how to use ACos --->

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<TITLE>
ACos Example
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<H3>ACos Example</H3>

<!--- output its arccosine value --->
<CFIF IsDefined("form.CosNum")>
	<CFIF IsNumeric(form.CosNum)>
		<CFIF form.CosNum LESS THAN OR EQUAL TO 1>
			<CFIF form.CosNum GREATER THAN OR EQUAL TO -1>
				ACos(<CFOUTPUT>#form.CosNum#</CFOUTPUT>) = <CFOUTPUT>#ACos(form.cosNum)# Radians</CFOUTPUT>
				<BR>
				or
				<BR>
				ACos(<CFOUTPUT>#form.CosNum#</CFOUTPUT>) = <CFOUTPUT>#Evaluate(ACos(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>
		<CFELSE>
<!--- if it is empty, output an error message --->
		<H4>Please enter a number between -1 and 1</H4>
		</CFIF>
	</CFIF>		
</CFIF>

<FORM ACTION="acos.cfm" METHOD="POST">
<P>Type in a number to get its arccosine in Radians and Degrees.
<BR><INPUT TYPE="Text" NAME="cosNum" SIZE="25">

<P><INPUT TYPE="Submit" NAME=""> <INPUT TYPE="RESET">

</FORM>

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