Graph Forums — Inverse tangent

Re: Inverse tangent

null@example.com (trixap) — Wed, 01 Sep 2010 03:56:20 +0000

Thank you helped a lot

Re: Inverse tangent

null@example.com (Ivan Johansen) — Tue, 31 Aug 2010 22:07:02 +0000

trixap wrote:

How do i make inverse tangent, if I fx wants to write tan^-1(x/y)

Try using the atan function.

trixap wrote:

Is it possible to sketch the following relation (polar coordinates)
2

Graph does not support polar inequalities, but you can convert it into Cartesian coordinates:
2 < sqrt(x^2+y^2) <= 5 and 3pi/4 < angle(x,y) < 5pi/4

You can create the angle function as a custom function:
angle(x,y)=if(x<0, atan(y/x)+pi, atan(y/x))

I have attached a file that shows this.

Inverse tangent

null@example.com (trixap) — Tue, 31 Aug 2010 15:10:15 +0000

Hi
I have 2 questions.
Firstly:
How do i make inverse tangent, if I fx wants to write tan^-1(x/y)
Secondly:
Is it possible to sketch the following relation (polar coordinates)
2Hope you can help
//Trixap