atan
Declaration
double* function atan(double* X)
Description
atan returns the arc tangent of X.. Atan returns a value between -pi/2 and
pi/2.
Example Stored Procedure
CREATE PROCEDURE test_asin (x DOUBLE PRECISION)
RETURNS (result DOUBLE PRECISION) AS
BEGIN
result = asin(x);
END!!
WISQL - calling the example stored procedure
execute procedure test_atan(-1.1);
RESULT
======================
-0.8329812666744317
execute procedure test_atan(1);
RESULT
======================
0.7853981633974483
Error Results - restrictions on X are : -PI/2 < X < PI/2
execute procedure test_atan( 1.7);
RESULT
======================
-999999
execute procedure test_atan( -1.7);
RESULT
======================
-999999