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>