#### Topic: Help! Graphs of the Tan, Cot, Csc, and Sec Functions

1) I want to graph them say in blue, solid line [like my book Sullivan Precallculus 8e] showing the limit not used in red dashed line.

2) also need to graph functions that are x=y is there a way?

I use http://interactmath.com/Exercises.aspx to aid in teaching me the math for my college class MTH1460 Precallculus [Trig..].

Thanks,