# Plotting two functions against each other

I have two functions which are functions of t. Let's just say x1[t] and x2[t]. I want to plot x1 vs x2. How do I do this?

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I would not delete this just because it's simple. It's another Google entry point. I can imagine beginners googling precisely for the title of this question. –  Szabolcs Dec 8 '13 at 19:06
Possible duplicate: mathematica.stackexchange.com/questions/29962/… –  Michael E2 Dec 8 '13 at 19:31

ParametricPlot will do this. You can see several examples on its documentation page.
ParametricPlot[{x1[t], x2[t]}, {t, 0, 1}]