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Commit a2571285 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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    ...@@ -59,6 +59,14 @@ $`\newcommand{\ddpt}[1]{\overset{\large\bullet\bullet}{#1}}`$ ...@@ -59,6 +59,14 @@ $`\newcommand{\ddpt}[1]{\overset{\large\bullet\bullet}{#1}}`$
    $`U(x,t) =A\;\big[cos(\underbrace{kx - \omega t}_{\text{ posons }\\ kx - \omega t \,=\, \alpha} + \varphi_1) + cos(\underbrace{kx - \omega t}_{=\; \alpha} + \varphi_1)\,\big]`$ $`U(x,t) =A\;\big[cos(\underbrace{kx - \omega t}_{\text{ posons }\\ kx - \omega t \,=\, \alpha} + \varphi_1) + cos(\underbrace{kx - \omega t}_{=\; \alpha} + \varphi_1)\,\big]`$
    $`\begin{align} U(&x,t) = U_1(x,t) + U_2(x,t) \\
    &\\
    &=A\;\big[cos(\underbrace{kx - \omega t}_{\text{ posons }\\ kx - \omega t \,=\, \alpha}
    + \varphi_1) + cos(\underbrace{kx - \omega t}_{=\; \alpha} + \varphi_1)\,\big]
    \end{align}`$
    * L'onde résultante $`U = U_1 + U_2`$ : * L'onde résultante $`U = U_1 + U_2`$ :
    $`\begin{align} U(x,t) &= U_1(x,t) + U_2(x,t) \\ $`\begin{align} U(x,t) &= U_1(x,t) + U_2(x,t) \\
    &\\ &\\
    ......
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