The ACOS function returns the arc cosine of a specified number.
The specified number is the cosine, in radians, of the angle that you
want. The specified number must be a
- If the specified number is
NULL, the result of this function is NULL.
- If the absolute value of
the specified number is greater than 1, an exception is returned that indicates
that the value is out of range (SQL state 22003).
The returned value, in radians, is in the range of zero (0) to
pi. The data type of the returned value is a DOUBLE