Hi,

I just signed up to try out Mathematica Online. I'm trying to work through some examples to learn how to use it.

To experiment with eliminating variables in parametric equations, I tried the following standard example:

eqn={x==rCos[t],y==rSin[t]}

Eliminate[eqn,{r,t}]

Using "Convert To" -> "InputForm" in the function menu on the righthand side of the input screen for the 2nd line, I got this output:

InverseFunction[rSin, 1, 1][y] == InverseFunction[rCos, 1, 1][x]

(I don't know how to paste the program's actual output into this post editor.)

I expected to get the standard equation of a circle:

x^2 + y^2 = r^2

What am I missing?

Thanks!