The range of the result is 0 to p.To convert degrees to radians, multiply degrees by p/180. To convert radians to degrees, multiply radians by 180/p.
<h3>ACos Example</h3>
<!--- Output the arccosine value. --->
<cfif IsDefined("FORM.CosNum")>
<cfif IsNumeric(FORM.CosNum)>
<cfif Abs(FORM.CosNum) LESS THAN OR EQUAL TO 1>
<cfoutput>ACos(#FORM.CosNum#) = #ACos(FORM.cosNum)# Radians </cfoutput>
<br>or<br>
<cfoutput>ACos(#FORM.CosNum#) = #ACos(FORM.cosNum) * 180/PI()#</cfoutput>
<cfelse>
<!--- If it is empty, output an error message. --->
<h4>Enter a number between -1 and 1</h4>
</cfif>
</cfif>
</cfif>
<form method="post" action = "acos.cfm">
<p>Enter 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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