\documentclass[14pt]{classPres}
\usepackage{tkz-fct}

\author{}
\title{}
\date{}

\begin{document}
\begin{frame}{Questions flashs}
    \begin{center}
        \vfill
        Tsti2d
        \vfill
        30 secondes par calcul
        \vfill
        \small \jobname
    \end{center}
\end{frame}

\begin{frame}{Calcul 1}
    Calculer la quantité suivante
    \[
        \int_{1}^{3} 5 dx = 
    \]
\end{frame}

\begin{frame}{Calcul 2}
    Résoudre
    \[
        4x + 2 \geq 0
    \]
\end{frame}

\begin{frame}{Calcul 3}
    Soit
    \[
        \left\{
            \begin{array}{l}
                u_{n+1} = 3u_n\\
                u_0 = 2
            \end{array}
            \right.
    \]
    Calculer $u_3$
\end{frame}

\begin{frame}{Calcul 4}
    Mesure en \textbf{radian} de l'angle $(\vec{OI}; \vec{OA})$
    \begin{center}
        \begin{tikzpicture}[scale=3]
            \cercleTrigo
            \foreach \x in {0,45,...,360} {
                % dots at each point
                \filldraw[black] (\x:1cm) circle(0.6pt);
            }
            \draw (135:1)  node [above left] {A}; 
            \draw (0,0) -- (135:1);
            \draw[->, very thick, red] (0.5,0) arc (0:135:0.5) ; 
        \end{tikzpicture}
    \end{center}
\end{frame}

\begin{frame}{Fin}
    \begin{center}
        On retourne son papier.
    \end{center}
\end{frame}


\end{document}