# 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)

SinCosACosTanAtnPi

#### 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



ASin Example

or
ASin(#FORM.SinNum#) = #ASin(FORM.sinNum) * 180/Pi()# Degrees

Enter the sine of the angle to calculate, in degrees and radians. The value must be between 1 and -1, inclusive.

Enter the sine of the angle to calculate, in degrees and radians. The value must be between 1 and -1, inclusive.

Enter the sine of the angle to calculate, in degrees and radians. The value must be between 1 and -1,inclusive.

Enter a number to get its arcsine in Radians and Degrees.

### Example

```<cfscript>
number=0.5;
writeOutput(asin(0.5));  // Returns 0.523598775598
</cfscript>``` 내 계정 로그인