Topic: How to draw this function?

I don't know how to draw this function with Graph: y=2tan^-1(43.267/2x)

I also tried some different kinds of writing but nothing worked. For example:
y=2cot(43.267/2x)
y=2tan(43.267*(2x)^-1)^-1

My CAS-calculator (Casio ClassPad 330) draws this function correctly.

Has anyone an idea how to do that?

I added a series of points which should theoretically lie on the function.

Post's attachments

Attachment icon myproblem.grf 834 b, 528 downloads since 2013-09-04 

Re: How to draw this function?

You are close. The inverse tangent is called atan, so the function becomes f(x)=2atan(43.267/2x).
The manual contains a list of all supported functions:
http://www.padowan.dk/doc/english/ListOfFunctions.html

Re: How to draw this function?

Thank you very much. Now it works smile