Arccosine function. The arccosine is the angle whose cosine is number.
The arccosine of a number, in radians.
ACos(number)
Parameter | Description |
---|---|
number |
Cosine of an angle. The value must be between -1.0 and 1.0, inclusive. |
The range of the result is 0 to π.
To convert degrees to radians, multiply degrees by π/180. To convert radians to degrees, multiply radians by 180/π.
<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>Enter a number between -1 and 1</h4> </cfif> <cfelse> <!--- if it is empty, output an error message ---> <h4>Enter a number between -1 and 1</h4> </cfif> </cfif> </cfif> <form 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>