Returns the arcsine, in radians, of a number between -1 and 1, inclusive.
ASin ( numExpr )
numExpr
A numeric expression with a value between -1 and 1, inclusive.
ASin returns the angle, in radians, whose sine is equal to the value of numExpr.
The range of the return value is -pi/2 to pi/2, inclusive.
The data type of the return value is Double.
If the value of numExpr is not in the range -1 to 1, inclusive, the function raises an error.