29 lines
365 B
Markdown
29 lines
365 B
Markdown
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sr-due: 2023-09-25
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sr-interval: 257
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sr-ease: 302
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up::[[MOC trigonométrie]]
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#maths/trigonométrie #review
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----
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# cosinus
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$\cos(x) = \dfrac{e^{ix}+e^{-ix}}{2}$
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![[formule_euler_cos.excalidraw|1200]]
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# sinus
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$\sin(x) = \dfrac{e^{ix} - e^{-ix}}{2i}$
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![[formule_euler_sin.excalidraw|1050]]
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# exponentielle
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$e^{i\theta} = \cos(\theta) + i\sin(\theta)$
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