Graphing only a partial domain

[burt]

This might be a terrible place to ask this, but maybe someone can help me out:
Is it possible to graph only a specific domain of a function on a TI-83+?
For example: I want to graph a polar function, but I only want to see it from \(\theta=\pi\) to \(\theta=2\pi\).

 

[Dr.Peterson]

Yes, it can be done, though I don't have a working TI-83 to check on. I don't think I've done this in polar form, but it should work.

There should be an example on Piecewise Functions in the manual (under Activities); basically, you multiply the function by inequalities, which evaluate to 0 when they are invalid. In this case, it should be r = ... (θ>π)(θ<2π). That will include r=0 in the plot, since the function returns 0 outside the domain; if you don't want that, I think you can use r = ... /(θ>π)/(θ<2π), which is undefined outside the domain.

 

[Harry_the_cat]

Google "restricting domain on ti84+" if you dont have the manual.