Attribuer à chaque point sur le cercle trigonométrique ci-dessous la mesure principale de l'angle qui lui est associé.

\begin{center}
\begin{tikzpicture}[>=latex]
\draw[gray,dotted] (-3,-3) grid[step=0.75cm] (3,3);
\draw[->] (-3,0) -- (3,0);
\draw[->] (0,-3) -- (0,3);
\draw (0,0) circle (3cm);
\foreach \a/\P/\w in {
30/D/right,
45/G/above right,
60/C/above,
135/F/above left,
150/A/left,
210/E/below left,
300/B/below right%
}
{
\draw[dashed] (0,0) -- (\a:3cm) node[\w] {\P};
\fill[blue] (\a:3cm) circle (1pt);
}
\end{tikzpicture}
\end{center}

