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@@ -2,7 +2,7 @@ up::[[formules de trigonométrie]]
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sibling::[[sinus hyperbolique du double]]
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type::"formule de duplication", "hyperbolique"
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title::$\mathrm{ch}(2x) = \mathrm{ch}^{2}(x)+\mathrm{sh}^{2}(x)$
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#maths/trigonométrie
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#s/maths/trigonométrie
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---
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