Które są które???
xt = cos 2 t, yt = sin 2 t xt = cos 2 t2, yt = sin 2 t2 xt = cos2 2 t, yt = sin2 2 t xt = sin3 2 t, yt = cos3 2 t xt = cos 2 t, yt = cos2 2 t xt = sin2 2 t, yt = sin 2 t xt = cos2 2 t, yt = sin 2 t xt = cos 2 t, yt = cos 2 t