ASin

Description

Returns the arcsine of a number, in radians. The arcsine is the angle whose sine is number.

Syntax

ASin(number)

Parameters

Parameter

Description

number
Sine of the angle to calculate. The value must be between 1 and -1.

Parameter	Description
number	Sine of the angle to calculate. The value must be between 1 and -1.

Usage

The range of the result is -π/2 to π/2 radians. To convert degrees to radians, multiply degrees by π/180. To convert radians to degrees, multiply radians by 180/π.

Example

<!--- This example shows how to use ASin --->

<html>
<head>
<title>ASin Example</title>
</head>

<body bgcolor = silver>
<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>#Evaluate(ASin(FORM.sinNum))# Radians</cfoutput>
         <BR>
         or
         <BR>ASin(<cfoutput>#FORM.SinNum#</cfoutput>) = 
        <cfoutput>
          #Evaluate(ASin(FORM.sinNum) * 180/Pi())# Degrees
        </cfoutput>
      <cfelse>
<!--- if it is less than negative one, output an error message --->
      <H4>Please 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>Please 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>Please enter the sine of the angle that is to be 
    calculated in degrees and radians. The value must be
    between 1 and -1,inclusive.</H4>  
  </cfif>  
</cfif>

<form action = "asin.cfm" method = "POST">
<P>Type in 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>

</body>
</html>