Update cheatsheet.fr.md

12.temporary_ins/08.grad-div-rot/20.div/20.overview/cheatsheet.fr.md

@@ -29,12 +29,12 @@ visible: false
 
 ##### Expression de la divergence en coordonnées sphériques
 
-<br>**$`\mathbf{\boldsymbol{div\,\overrightarrow{X}\color{gray}{\;=\dfrac{d\Phi_X}{d\tau}}\,=
+<br>**$`\boldsymbol{d\mathbf{iv\,\overrightarrow{X}\color{gray}{\;=\dfrac{d\Phi_X}{d\tau}}\,=
 \; \dfrac{1}{r^2}\;\dfrac{\partial\,(r^2\,X_r}{\partial\,r)}}}`$**   
    
-**$`\hspace{4.5cm}\mathbf{\boldsymbol{+ \dfrac{1}{r\,sin\,\theta}\;\dfrac{\partial\,(sin\,\theta\,X_{\theta})}{\partial\,\theta}}}`$**   
+**$`\hspace{4.5cm}\boldsymbol{\mathbf{+ \dfrac{1}{r\,sin\,\theta}\;\dfrac{\partial\,(sin\,\theta\,X_{\theta})}{\partial\,\theta}}}`$**   
    
-**$`\hspace{6.2cm}\mathbf{\boldsymbol{+ \dfrac{1}{r\,sin\,\theta}\;\dfrac{\partial\,X_{\varphi}}{\partial\,\varphi}}}`$**
+**$`\hspace{6.2cm}\boldsymbol{\mathbf{+ \dfrac{1}{r\,sin\,\theta}\;\dfrac{\partial\,X_{\varphi}}{\partial\,\varphi}}}`$**
 
 <!--
 <br>**$`\mathbf{\boldsymbol{\begin{align}