Update cheatsheet.fr.md

12.temporary_ins/90.electromagnetism-in-vacuum/20.electromagnetic-waves-vacuum/20.overview/cheatsheet.fr.md

@@ -156,7 +156,7 @@ puis d'une onde plane progressive monochromatique (OPPM).
     \\
     &\dfrac{\partial E_x}{\partial x}=\dfrac{\partial E_y}{\partial y}=0
     \end{align}\right\}`$
-    *$`\Longrightarrow\;\dfrac{\partial E_z}{\partial z}=0`$*   
+    *$`\Longrightarrow\;\begin{align}\\\dfrac{\partial E_z}{\partial z}=0\\équa.1\end{align}`$*   
     
 <br>
 
@@ -235,9 +235,9 @@ puis d'une onde plane progressive monochromatique (OPPM).
     \begin{align}
     &-\dfrac{\partial B_y}{\partial z}=\dfrac{1}{c^2}\;\dfrac{\partial E_x}{\partial t}\\
     \\
-    &\dfrac{\partial B_x}{\partial z}=\dfrac{1}{c^2}\;\dfrac{\partial E_y}{\partial t}\\
+    &\;\dfrac{\partial B_x}{\partial z}=\dfrac{1}{c^2}\;\dfrac{\partial E_y}{\partial t}\\
     \\
-    &\dfrac{\partial E_z}{\partial t}=0
+    &\;\dfrac{\partial E_z}{\partial t}=0
     \end{align}\right.`$*