ASin

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

Mathematical functions

Function syntax

ASin(number)

See also

Sin, Cos, ACos, Tan, Atn, Pi

Parameters

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>

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