ATAN( numeric-expression )

The ATAN and TAN functions are inverse operations.

DOUBLE

This function converts its argument to DOUBLE, and performs the computation in double-precision floating-point arithmetic.

• ACOS function [Numeric]
• ASIN function [Numeric]
• ATAN2 function [Numeric]
• TAN function [Numeric]

The following statement returns the arc-tangent value for 0.52.

SELECT ATAN( 0.52 );