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>