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@@ -5,7 +5,7 @@ up::[[formules de trigonométrie]]
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sibling::[[sinus du double]]
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type::"formule de duplication"
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title::$\cos(2x) = \cos^{2}(x) - \sin^{2}(x)$
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#maths/trigonométrie
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#s/maths/trigonométrie
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---
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