SIN |
Description Calculates the sine of an angle that is entered in radians.
Returns A number; the sine of the angle.
Category Mathematical functions
Function syntax
    Sin(number)
See also ASin, Cos, ACos, Tan, Atn, Pi
Parameters
Usage 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.
Note: | Because the function uses floating point arithmetic, it returns a very small number (such as 6.12323399574E-017) for angles that should produce 0. To test for a 0 value, check whether the value is less than 0.0000000000001.
Example
    <h3>Sin Example</h3>
    <!--- Calculate sine if form has been submitted --->
    <cfif IsDefined("FORM.sinNum")>
    <!--- Make sure input is a number --->
       <cfif IsNumeric(#FORM.sinNum#)>
    <!--- Convert degrees to radians, call the Sin function. --->
            <cfset sinValue=#Sin((Form.sinNum * PI()) / 180)#>
    <!--- 0.0000000000001 is the function's precision limit.
         If absolute value of returned sine value is
         less, set result to 0 --->
            <cfif Abs(sinValue) LT 0.0000000000001>
               <cfset sinValue=0>
            </cfif>
            <cfoutput>
              Sin(#FORM.sinNum#) = #sinValue#<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 sine:
        <br><input type = "Text" name = "sinNum" size = "15">
        <br><br>
        <input type = "Submit" name = "">&nbsp;&nbsp;
        <input type = "RESET"
    </form>

NUMBER |

Angle, in radians for which to calculate the sine.