The tangent of the desired angle.x
If the second argument is supplied, ATAN returns the angle whose tangent is equal to y /x. If both arguments are zero, the result is undefined.
Returns the arctangent of the input.
The tangent of the desired angle.x
If the second argument is supplied, ATAN returns the angle whose tangent is equal to y /x. If both arguments are zero, the result is undefined.
The angle, in radians, whose tangent is y (or, optionally y /x).
/ 2 and / 2 for the single argument case and between - and if two arguments are given. If y or x are double-precision floating, the result of ATAN is also double precision. Arguments are not allowed to be complex. All other types are converted to single-precision floating point and yield floating-point results.
PRINT, !radeg*atan(2,3) 33.6901
For a list of other transcendental functions, see Chapter 1, Functional Summary of Routines.
