The ATAN function returns the arc tangent of the argument as an angle expressed in radians. The ATAN and TAN functions are inverse operations.
The data type of the result is double-precision floating point. If the argument can be null, the result can be null; if the argument is null, the result is the null value.
The result is greater than or equal to -/2 and less than or equal to /2.
SELECT ATAN(:ATANGENT) FROM SYSIBM.SYSDUMMY1Returns the approximate value 1.50.
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