From bf408397b926e2a92d0af36baa3c72f666d54772 Mon Sep 17 00:00:00 2001 From: Claude Meny Date: Sun, 30 Aug 2020 19:23:27 +0200 Subject: [PATCH] Update textbook.fr.md --- .../04.reference-frames-coordinate-systems/textbook.fr.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md index 8e748931f..aeb149fff 100644 --- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md +++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md @@ -255,7 +255,7 @@ $`=dx\;\overrightarrow{e_x}+dy\;\overrightarrow{e_y}+dz\;\overrightarrow{e_z}`$<
$`||\overrightarrow{dl}||=\sqrt{dl_x^2+dl_y^2+dl_z^2}=\sqrt{dx^2+dy^2+dz^2}`$

$`||\overrightarrow{dl}||=\sqrt{\overrightarrow{dl}\cdot\overrightarrow{dl}}`$ $`=\left[(dl_x\;\overrightarrow{e_x}+dl_y\;\overrightarrow{e_y}+dl_z\;\overrightarrow{e_z})\cdot -(dl_x\;\overrightarrow{e_x}\rigth.`$ +(dl_x\;\overrightarrow{e_x}\right.`$ $`\left.+dl_y\;\overrightarrow{e_y}+dl_z\;\overrightarrow{e_z})\right]^{1/2}`$ $`=\left[(dl_x)^2\;(\overrightarrow{e_x}\cdot\overrightarrow{e_x})\right.`$ $`+(dl_y)^2\;(\overrightarrow{e_y}\cdot\overrightarrow{e_y})`$