ACos |
Description
Arccosine function. The arccosine is the angle whose cosine is number.
Returns
The arccosine, in radians, of a number.
Category
Mathematical functions
Function syntax
    ACos(number)
See also
Cos, Sin, ASin, Tan, Atn, Pi
Parameters
Parameter | Description
number | Cosine of an angle. The value must be between -1.0 and 1.0, inclusive.
Usage
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.
Example
    <h3>ACos Example</h3>
    <!--- output its 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>

number |
Cosine of an angle. The value must be between -1.0 and 1.0, inclusive.