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up:: [[trigonométrie|trigonométrie]]
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title:: "$a \cos(x) + b \sin(x) = \sqrt{ a^{2}+b^{2} } \sin (x + \varphi)$", "où $\cos \varphi = \dfrac{b}{\sqrt{ a^{2} + b^{2} }}$ et $\sin\varphi = \dfrac{a}{\sqrt{ a^{2} + b^{2} }}$"
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#maths/trigonométrie
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#s/maths/trigonométrie
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