Última atualização em
11 de jan de 2022
|
Também é aplicável a ColdFusion
Description
Determines the arcsine of a number. The arcsine is the angle whose sine is number.
Returns
The arcsine, in radians, of a number.
Category
Function syntax
ASin(number) |
See also
Parameters
Parameter |
Description |
|---|---|
number |
Sine of an angle. The value must be between -1 and 1, inclusive. |
Usage
The range of the result is -p/2 to p/2 radians. To convert degrees to radians, multiply degrees by p/180. To convert radians to degrees, multiply radians by 180/p.
Example
| <h3>ASin Example</h3> <!--- Output its arcsine value. ---> <cfif IsDefined("FORM.SinNum")> <cfif IsNumeric(FORM.SinNum)> <cfif FORM.SinNum LESS THAN OR EQUAL TO 1> <cfif FORM.SinNum GREATER THAN OR EQUAL TO -1> ASin(<cfoutput>#FORM.SinNum#</cfoutput>) = <cfoutput>#ASin(FORM.sinNum)# Radians</cfoutput> <br> or <br>ASin(<cfoutput>#FORM.SinNum#</cfoutput>) = <cfoutput> #ASin(FORM.sinNum) * 180/Pi()# Degrees </cfoutput> <cfelse> <!--- If it is less than negative one, output an error message. ---> <h4>Enter the sine of the angle to calculate, in degrees and radians. The value must be between 1 and -1, inclusive.</h4> </cfif> <cfelse> <!--- If it is greater than one, output an error message. ---> <h4>Enter the sine of the angle to calculate, in degrees and radians. The value must be between 1 and -1, inclusive.</h4> </cfif> <cfelse> <!--- If it is empty, output an error message. ---> <h4>Enter the sine of the angle to calculate, in degrees and radians. The value must be between 1 and -1,inclusive.</h4> </cfif> </cfif> <form action = "./evaltest.cfm" method="post"> <p>Enter a number to get its arcsine in Radians and Degrees. <br><input type = "Text" name = "SinNum" size = "25"> <p><input type = "Submit" name = ""> <input type = "RESET"> </form> |
Example
<cfscript> number=0.5; writeOutput(asin(0.5)); // Returns 0.523598775598 </cfscript>