AsinFileMaker Pro 9.0The arcsine is the angle whose sine is number. The returned angle is given in radians in the range -Pi/2 to Pi/2. The input number parameter must be between -1 and 1.Asin(-0.5) returns -0.523598776.Asin(-0.5)*180/Pi returns -30.Degrees(Asin(-0.5)) returns -30.Asin(2)returns ? (not a number).