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cours/sinus hyperbolique du double.md
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sibling:: cosinus hyperbolique du double up::formules de trigonométrie sibling::cosinus hyperbolique du double type::"formule de duplication", "hyperbolique" title::$\mathrm{sh}(2x) = 2\mathrm{sh}(x)\mathrm{ch}(x)$ #maths/trigonométrie

\mathrm{sh}(2x) = 2\mathrm{sh}(x)\mathrm{ch}(x)