Posted by Nikki on .
Graph and identify the kind of conic the graph represents:
a. x(t)=3 cos t
y(t)=3 sin t
on [0,2pi]
b. x(t) =2 cos t
y(t) =5 sin t
on [1,5]
I tried graphing A on my TI89 calculator as y(1)=3 cos x and y(2)=3 sin x. All I see are two wavelike graphs crossing each other; I don't see a conic. Did I do something wrong?
Thanks very much!

Math 
Marth,
those are parametric equations  x(t) and y(t).
Go to mode, scroll down until you see "Func" selected. Select "Par" instead.
Now you can graph the equations x(t) and y(t) together.