Hey there:

Just got a CX CAS and can now join this community instead of being an occasional lurker. My 83+ broke the other day, so I went for an upgrade. Although today in class our teacher graphed a parametric function and taught the class how to find the max using an 84+. I tried it on my CX CAS and did not prevail (check below for gif). I got to the max function and was able to graph the parametric equation, although when it asked me to choose the graph in which I was interested in finding the max, the parametric equation graph wasn't valid, and would bolden and highlight when I put the cursor over it. My question to you guys is, how would one find the max of a parametric equation on the CX CAS, and why didn't my way work? Thanks

This is what happens when I try to do it my way.