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@@ -7,7 +7,7 @@ up::[[formules de trigonométrie]]
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sibling::[[tangente hyperbolique du double]]
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type::"formule de duplication"
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title::$\tan(2x) = \dfrac{2\tan(x)}{1-\tan^{2}(x)}$
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#maths/trigonométrie
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#s/maths/trigonométrie
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----
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