ArcTan• ArcTan[z] gives the arc tangent  of the complex number z.
• ArcTan[x, y] gives the arc tangent of  , taking into account which quadrant the point  is in. • All results are given in radians.
• For real z, the results are always in the range  to  .
• ArcTan[z] can be input as  .
• If x or y is complex, then ArcTan[x, y] gives  . When  , ArcTan[x, y] gives the number  such that  and  .
• See also: ArcCos, ArcSin, Arg.
 Examples Using InstantCalculatorsHere is the InstantCalculator for the ArcTan function. Enter the parameters for your calculation and click Calculate to see the result.
Out[1]= |  |
Entering Commands DirectlyYou can paste a template for this command via the Text Input button on the ArcTan Function Controller. Here is a plot of ArcTan[x] for x from -10 to 10.
This is the derivative.
Out[3]= |  |
This is the indefinite integral.
Out[4]= |  |
Ordinary Mathematical NotationThis also gives the derivative.
Out[5]= |  |
This also gives the indefinite integral.
Out[6]= |  |
| 
