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

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>