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This is a fairly simple notation problem. I am trying to compute ArcTan of the point (5,2). I have the code: 

ArcTan[5,2]

which outputs:

ArcTan[2/5]

Do I have to clarify that I would like my output in terms of radians or Pi? Technically the output is correct, but not very useful.

Ideally I would found that the Arctan[5,2]=Arctan(2/5)=.3805. Which I guess would be found by using N[function]. Any ideas on how to get where it is Pi*x such that x in Reals?

I have used the page: https://reference.wolfram.com/language/ref/ArcTan.html. For help

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  • $\begingroup$ Are you looking for N? $\endgroup$ – Szabolcs Oct 20 '15 at 21:35
  • $\begingroup$ N as in the numerical version? For that I just do N[function] $\endgroup$ – Jack Armstrong Oct 20 '15 at 21:37
  • $\begingroup$ Could you write down your expected result? $\endgroup$ – Dr. belisarius Oct 20 '15 at 21:51
  • $\begingroup$ Sure, give me a moment $\endgroup$ – Jack Armstrong Oct 20 '15 at 21:52
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    $\begingroup$ If you want a numerical result you can use ArcTan[5,2.]. Note the period following the 2. This will output it in radians. If you want degrees use ArcTan[5,2.]/Degree. $\endgroup$ – Jack LaVigne Oct 20 '15 at 22:01
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If you want a numerical result you can use

ArcTan[5, 2.]

(* 0.380506 *)

Note the period following the 2. This will output it in radians.

If you want degrees use

ArcTan[5, 2.]/Degree

(* 21.8014 *)
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