Commit aecf04eb authored by Claude Meny's avatar Claude Meny

Update textbook.fr.md

parent 3831016d
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...@@ -157,7 +157,8 @@ en el sentido del movimiento.<br> ...@@ -157,7 +157,8 @@ en el sentido del movimiento.<br>
et dirigé dans le sens du mouvement.<br> et dirigé dans le sens du mouvement.<br>
[EN] with $`\overrightarrow{e_T}`$ the unit vector tangent to the trajectory and [EN] with $`\overrightarrow{e_T}`$ the unit vector tangent to the trajectory and
oriented in the direction of movement.<br> oriented in the direction of movement.<br>
<br>$`\overrightarrow{e_T}=\dfrac{\overrightarrow{l}}{||\overrightarrow{l}||}. <br>$`\overrightarrow{e_T}=\dfrac{\overrightarrow{dl}}{||\overrightarrow{dl}||}
=\dfrac{\overrightarrow{dr}}{||\overrightarrow{dr}||}`$.
<!--$`\overrightarrow{e_T} <!--$`\overrightarrow{e_T}
=\dfrac{\dfrac{\partial \overrightarrow{OM}}{\partial x}}{\left| \left| =\dfrac{\dfrac{\partial \overrightarrow{OM}}{\partial x}}{\left| \left|
......
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