Calculates the cosine of an angle that is entered in radians.
A number; the cosine of the angle.
Cos(number
)
Parameter |
Description |
---|---|
number |
Angle, in radians, for which to calculate the cosine |
The range of the result is -1 to 1.
To convert degrees to radians, multiply degrees by p/180. To convert radians to degrees, multiply radians by 180/p.
<h3>Cos Example</h3> <!--- Calculate cosine if form has been submitted. ---> <cfif IsDefined("FORM.cosNum")> <!--- Make sure input is a number. ---> <cfif IsNumeric(#FORM.cosNum#)> <!--- Convert degrees to radians, call the Cos function. ---> <cfset cosValue=#Cos((Form.cosNum * PI()) / 180)#> <!--- 0.0000000000001 is the function's precision limit. If the absolute value of the returned cosine value is less, set result to 0 .---> <cfif Abs(cosValue) LT 0.0000000000001> <cfset cosValue=0> </cfif> <cfoutput>Cos(#FORM.cosNum#) = #cosValue#<br><br></cfoutput> <cfelse> <!--- If input is not a number, show an error message. ---> <h4>You must enter a numeric angle in degrees.</h4> </cfif> </cfif> <form action = "#CGI.script_name#" method="post"> Enter an angle in degrees to get its cosine: <br><input type = "Text" name = "cosNum" size = "15"><br><br> <input type = "Submit" name = ""> <input type = "RESET" </form>