Commit 673008c6 authored by Claude Meny's avatar Claude Meny

Update textbook.fr.md

parent 15b3ab55
Pipeline #4370 canceled with stage
...@@ -409,7 +409,7 @@ $`= ...@@ -409,7 +409,7 @@ $`=
\end{array} \right.\quad`$ \end{array} \right.\quad`$
$`=-\,\overrightarrow{e_{\rho}}`$ $`=-\,\overrightarrow{e_{\rho}}`$
avec $`\overrightarrow{e_{\rho}}`$ vecteur de la base cylindrique : où $`\overrightarrow{e_{\rho}}`$ est le vecteur de la base cylindrique :
$`(\overrightarrow{e_{\rho}}, \overrightarrow{e_{\phi}}, \overrightarrow{e_z})`$. $`(\overrightarrow{e_{\rho}}, \overrightarrow{e_{\phi}}, \overrightarrow{e_z})`$.
$`\dfrac{d\overrightarrow{e_r}}{dt}=\dfrac{\partial\overrightarrow{e_r}}{\partial\theta}\cdot \dfrac{d\theta}{dt}\;+\;\dfrac{\partial\overrightarrow{e_r}}{\partial\varphi}\cdot \dfrac{d\varphi}{dt}\quad`$ $`\dfrac{d\overrightarrow{e_r}}{dt}=\dfrac{\partial\overrightarrow{e_r}}{\partial\theta}\cdot \dfrac{d\theta}{dt}\;+\;\dfrac{\partial\overrightarrow{e_r}}{\partial\varphi}\cdot \dfrac{d\varphi}{dt}\quad`$
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