ANS85 

The ATAN Function

General Format


*

Arguments

  1. Argument-1 must be class numeric.

Returned Values

  1. The returned value is the approximation of the arctangent of argument-1 and is greater than -pi/2 and less than +pi/2.
    Note: Conversion factors from radians to degrees and Gon (grad) are specified in the section Trigonometric Functions.
  2. Floating-point format is used for numeric non-integer results.