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Commit 9158edcf authored by Claude Meny's avatar Claude Meny
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Update cheatsheet.fr.md

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    12.temporary_ins/69.waves/30.n3/20.overview/cheatsheet.fr.md
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    ......@@ -1084,10 +1084,8 @@ commenter
    ![](sum-two-plane-wave-progressive-monochrome-complex-representation-3_L1200.jpg)
    $`\mathbf{A = \|\overrightarrow{U}\| =
    \sqrt{\overrightarrow{U}\cdot\overrightarrow{U}}
    =
    \sqrt{\big(\overrightarrow{U}_1 + \overrightarrow{U}_2\big)\cdot\big(\overrightarrow{U}_1 + \overrightarrow{U}_2\big)}}`$
    $`\mathbf{A = \|\overrightarrow{U}\| =\sqrt{\overrightarrow{U}\cdot\overrightarrow{U}}
    =\sqrt{\big(\overrightarrow{U}_1 + \overrightarrow{U}_2\big)\cdot\big(\overrightarrow{U}_1 + \overrightarrow{U}_2\big)}}`$
    $`\mathbf{ =
    \sqrt{\overrightarrow{U}_1\cdot\overrightarrow{U}_1 + \overrightarrow{U}_2\cdot\overrightarrow{U}_2+2\;\overrightarrow{U}_1\cdot\overrightarrow{U}_2}}`$
    ......
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