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5e année secondaire - 4h

Leçon 6: Formules d'addition

Utiliser les formules d'addition 1

cosine, left parenthesis, B, A, with, \widehat, on top, C, minus, 60, degrees, right parenthesis est égal à :

(Choix A)
start fraction, 6, divided by, 13, end fraction, minus, start fraction, 5, divided by, 26, end fraction, square root of, 3, end square root
(Choix B)
start fraction, 5, divided by, 26, end fraction, minus, start fraction, 6, divided by, 13, end fraction, square root of, 3, end square root
(Choix C)
start fraction, 6, divided by, 13, end fraction, plus, start fraction, 5, divided by, 26, end fraction, square root of, 3, end square root
(Choix D)
start fraction, 5, divided by, 26, end fraction, plus, start fraction, 6, divided by, 13, end fraction, square root of, 3, end square root

Bloqué(e) ?