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Chapter 3: ColdFusion Functions
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
π
/180. To convert radians to degrees, multiply
radians by 180/
π
.
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>
Parameter
Description
number
Angle, in radians for which to calculate the sine.
Summary of Contents for COLFUSION MX 7 - INSTALLING AND USING COLDFUSION MX
Page 1: ...COLDFUSION MX7 CFML Reference...
Page 20: ...20 Chapter 1 Reserved Words and Variables...
Page 50: ...50 Chapter 2 ColdFusion Tags cfelse br Searching cfif cfloop cfif...
Page 101: ...cfdefaultcase 101 cfdefaultcase cfswitch cfoutput Your grade is grade cfoutput...
Page 115: ...cfdocumentsection 115 cfdocumentsection cfoutput cfdocument...
Page 411: ...cftable 411 cftable body html...
Page 515: ...Chr 515 maxlength 5 p input type Submit name input type RESET cfform...
Page 605: ...GetEncoding 605 WriteOutput The encoding is theEncoding cfscript cfif...
Page 629: ...GetProfileString 629 tr td input type Submit name Submit value Submit td td td tr table form...
Page 655: ...IIf 655 cfoutput IIf Hour Now GTE 12 DE It is afternoon or evening DE It is morning cfoutput b...
Page 664: ...664 Chapter 3 ColdFusion Functions cfelse h3 Conversion error h3 cfif...
Page 687: ...IsStruct 687 cfoutput cfquery cfif cfoutput hr Employee Add Complete cfoutput cfcase cfswitch...
Page 751: ...LSDateFormat 751 hr noshade cfoutput cfloop...
Page 861: ...StructFind 861 cfquery cfif cfoutput hr Employee Add Complete cfoutput cfcase cfswitch...
Page 903: ...Val 903 value Is the beginning numeric name form...
Page 932: ...932 Chapter 3 ColdFusion Functions...
Page 944: ...944 Chapter 4 ColdFusion MX Flash Form Style Reference...
Page 962: ...962 Chapter 5 Application CFC Reference...
Page 1054: ...1054 Chapter 6 ColdFusion MX Event Gateway Reference...