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Tracer les courbes paramétrées suivantes
\[x (t) = \cos^{2} (t) \qquad y (t) = \cos^{3} (t)\sin (t)\]
\[x (t) = \frac{t}{1 + t^{4}} \qquad y (t) = \frac{t^{3}}{1 + t^{4}}\]
\[x (t) =t^{2} + \frac{2}{t} \qquad y (t) = t + \frac{1}{t}\]
\[x (t) = \frac{1-t^{2}}{1 + t^{2}} \qquad y (t) = t\frac{1-t^{2}}{1 + t^{2}}\]
\[x (t) =\tan (t) + \sin (t) \qquad y (t) = \frac{1}{\cos (t)}\]
\[x (t) = \sin (2t) \qquad y (t) = \sin (3t)\]