1 cos2x


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  • Formule de linéarisation

    Formule de linéarisation

    sin2α=12(1−cos2α) ;cos2α=12(1+cos2α).

  • Quel est la formule du cos ?

    Cosinus  = Côté adjacent (noté a) / Hypoténuse (noté h).
    Représentation graphique sur un intervalle de deux périodes de la fonction cosinus.
    Le cosinus est habituellement cité en deuxième parmi les fonctions trigonométriques.

  • Comment on fait pour calculer cos2x ?

    cos 2x = 1 − tan2 x 1 + tan2 x .

  • 1−cos(2x). 2 tan(x) = sin(2x). 1+cos(2x). = 1−cos(2x) sin(2x). En posant t = tan(x. 2. ) pour x ≡ π [2π],ona: cos(x) = 1−t2. 1+  Autres questions
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