\documentclass[a4paper,10pt]{article}
\usepackage{myXsim}

\title{Tableau des primitives- bilan}
\tribe{Terminale Sti2d}
\date{Septembre 2019}

\pagestyle{empty}
\geometry{left=10mm,right=10mm, top=10mm}

\begin{document}
\setcounter{section}{2}
\section{Tableau des primitives}

\begin{center}
    \begin{tabular}{|c|C{4cm}|}
        \hline
        Fonction $f$ & Primitive $F$ \\
        \hline
        $a$ & $ax$\\
        \hline
        $ax$ & $\frac{1}{2}ax^2$\\
        \hline
        $ax^2$ & $\frac{1}{3}ax^3$\\
        \hline
        $ax^n$ ($n\neq-1$) & $\frac{1}{n+1} ax^{n+1}$\\
        \hline
        $\frac{1}{x}$ & $\ln(x)$\\
        \hline
        $\cos(x)$ & $\sin(x)$\\
        \hline
        $\sin(x)$ & $-\cos(x)$\\
        \hline
    \end{tabular}
\end{center}

\end{document}