# Incorrect parametric pgfplot

I know that the equations (t-sin t, 1-cos t) define a cycloid that looks like this:

However the code

\begin{tikzpicture}
\begin{axis}[title={Ciklois}, no markers]
\addplot[variable=\t, domain=0:360] ({t-sin(t)}, {1-cos(t)});
\end{axis}
\end{tikzpicture}

gives me this:

What's the problem? I know that gnuplot may help me out here, but I don't want to install it unless really necessary.

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