Update...

Update 12.temporary_ins/05.coordinates-systems/40.spherical-coordinates/20.overview/cheatsheet.fr.md

12.temporary_ins/05.coordinates-systems/40.spherical-coordinates/20.overview/cheatsheet.fr.md

@@ -53,4 +53,4 @@ lessons:
 **$`\quad\mathbf{}\left\{\begin{array}{l} 
 \mathbf{ x=r\cdot sin\,\theta\cdot cos\,\varphi} \\
 \mathbf{ y=r\cdot sin\,\theta\cdot sin\,\varphi} \\
-\mathbf{ z=r\cdot} cos\,\theta\\ \end{array}\right. `$**
+\mathbf{ z= r\cdot cos\,\theta\\ \end{array}}\right. `$**