Update cheatsheet.fr.md

12.temporary_ins/40.classical-mechanics/30.n3/30.point-kinematics/20.overview/cheatsheet.fr.md

@@ -167,7 +167,7 @@ RÉSUMÉ
      **$`\begin{align}
      \Longrightarrow \left.\dfrac{d\overrightarrow{e_x}}{dt}\right\vert_{\mathscr{R}}&=\overrightarrow{0}\;,\;
      \left.\dfrac{d\overrightarrow{e_y}}{dt}\right\vert_{\mathscr{R}}=\overrightarrow{0}\\
-     &\text{et  }\left.\dfrac{d\overrightarrow{e_z}}{dt}\right\vert_{\mathscr{R}}=\overrightarrow{0
+     &\text{et  }\left.\dfrac{d\overrightarrow{e_z}}{dt}\right\vert_{\mathscr{R}}=\overrightarrow{0}
      \end{array}`$** 
 
 ! *Rappel :*