Update cheatsheet.fr.md

12.temporary_ins/69.waves/30.n3/20.overview/cheatsheet.fr.md

@@ -1383,14 +1383,14 @@ Travaillons d'abord avec les termes d'amplitudes :
 
 $`U(\overrightarrow{r},t) = U_1(\overrightarrow{r},t) + U_1(\overrightarrow{r},t)`$
 
-$`\quad = A_1\,cos\big(\underbrace{\omega_1 t + \overrightarrow{k}_1\cdot\overrightarrow{r}+\varphi_1}_{\texte{phase}_1}\big)`$
-$`\;+ A_2\,cos\big(\underbrace{\omega_2 t + \overrightarrow{k}_2\cdot\overrightarrow{r}+\varphi_2}_{\texte{phase}_2}\big)`$
+$`\quad = A_1\,cos\big(\underbrace{\omega_1 t + \overrightarrow{k}_1\cdot\overrightarrow{r}+\varphi_1}_{\color{blue}{\text{phase}_1(\vec{r},t)}}\big)`$
+$`\;+ A_2\,cos\big(\underbrace{\omega_2 t + \overrightarrow{k}_2\cdot\overrightarrow{r}+\varphi_2}_{\color{blue}{\text{phase}_2(\vec{r},t)}}\big)`$
 
-$`\quad = A_1\,cos(\texte{phase}_1) + A_2\,cos(\texte{phase}_2)`$
+$`\quad = A_1\,cos(\text{phase}_1) + A_2\,cos(\text{phase}_2)`$
 
-$`\quad = (A_{moy}+ \Delta A_{1-2})\,cos(\texte{phase}_1) + (A_{moy} - \Delta A_{1-2})\,cos(\texte{phase}_2)`$
+$`\quad = (A_{moy}+ \Delta A_{1-2})\,cos(\text{phase}_1) + (A_{moy} - \Delta A_{1-2})\,cos(\text{phase}_2)`$
 
-$`\quad = A_{moy}\big(\texte{phase}_1 + cos(\texte{phase}_2\big) + \Delta A_{1-2}\big(\texte{phase}_1 - cos(\texte{phase}_2\big)`$
+$`\quad = A_{moy}\big(\text{phase}_1 + cos(\text{phase}_2\big) + \Delta A_{1-2}\big(\text{phase}_1 - cos(\text{phase}_2\big)`$