This is documentation for Mathematica 5, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)

Documentation / Mathematica / Built-in Functions / Mathematical Functions / Elementary Functions /

ArcTan

FilledSmallSquare ArcTan[z] gives the arc tangent of the complex number z.

FilledSmallSquare ArcTan[x, y] gives the arc tangent of , taking into account which quadrant the point is in.

FilledSmallSquare Mathematical function (see Section A.3.10).

FilledSmallSquare All results are given in radians.

FilledSmallSquare For real z, the results are always in the range to .

FilledSmallSquare ArcTan[z] has branch cut discontinuities in the complex z plane running from to and to .

FilledSmallSquare If x or y is complex, then ArcTan[x, y] gives . When , ArcTan[x, y] gives the number such that and .

FilledSmallSquare See Section 1.1.3 and Section 3.2.6.

FilledSmallSquare See also: Arg.

FilledSmallSquare New in Version 1.

Further Examples