ASin function (LotusScript® Language)

Returns the arcsine, in radians, of a number between -1 and 1, inclusive.


ASin ( numExpr )



A numeric expression with a value between -1 and 1, inclusive.

Return value

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.