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sr-due: 2023-09-25
sr-interval: 257
sr-ease: 302


up::[[MOC trigonométrie]]
#maths/trigonométrie #review 

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# cosinus
$\cos(x) = \dfrac{e^{ix}+e^{-ix}}{2}$

![[formule_euler_cos.excalidraw|1200]]


# sinus
$\sin(x) = \dfrac{e^{ix} - e^{-ix}}{2i}$

![[formule_euler_sin.excalidraw|1050]]


# exponentielle

$e^{i\theta} = \cos(\theta) + i\sin(\theta)$