All trig functions operate on radians, an angular unit in which radians measure a full revolution.

 

package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){

         var valInRadians;
         var valInDegrees;
         valInRadians = valInDegrees / 180 * Math.PI;
         valInDegrees = valInRadians / Math.PI * 180;

    }
  }
}

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All trig functions operate on radians, an angular unit in which radians measure a full revolution. : Math « Development « Flash / Flex / ActionScript

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