Update cheatsheet.fr.md

12.temporary_ins/20.magnetostatics-vacuum/40.ampere-theorem-applications/30.cylindrical-current-distributions/10.rectilinear-current/10.ampere-integral/20.overview/cheatsheet.fr.md

@@ -214,11 +214,11 @@ Image à faire
 * Si **$`\mathbf{\overrightarrow{dl}=+\,\rho_M\,d\varphi\,\overrightarrow{e_{\varphi}}}`$** :  
  <br>
 **$`\mathbf{\oint_{\Gamma_A}\overrightarrow{B}\cdot\overrightarrow{dl}}`$**   
-$`\quad\quad=\oint_{\varphi=0}^{\varphi=2\pi}\big(B_{\varphi}(\rho_M)\,\overrightarrow{e_{\varphi}}\big)\cdot \big(+\rho_M\,d\varphi\,\overrightarrow{e_{\varphi}}\big)`$    
 <br>
  $`\quad\quad\color{blue}{\scriptsize{\quad\quad\text{En se rappellant que :}}}`$
- $`\quad\quad\color{blue}{\scriptsize{\quad\quad\text{invariances + symétries }\Longrightarrow \vec{B}=B_z(\rho)\,\vec{e_z}}}`$   
-
+ $`\quad\quad\color{blue}{\scriptsize{\quad\quad\text{invariances + symétries }\Longrightarrow \vec{B}=B_{\varphi}(\rho)\,\vec{e_{\varphi}}}`$   
+<br>
+$`\quad\quad=\oint_{\varphi=0}^{\varphi=2\pi}\big(B_{\varphi}(\rho_M)\,\overrightarrow{e_{\varphi}}\big)\cdot \big(+\rho_M\,d\varphi\,\overrightarrow{e_{\varphi}}\big)`$    
 <br>
 $`\displaystyle\quad\quad=\oint_{\varphi=0}^{\varphi=2\pi}B_{\varphi}(\rho_M)\,\rho_M\,\big(\overrightarrow{e_{\varphi}}\cdot \overrightarrow{e_{\varphi}}\big) d\varphi`$      
 <br>