Conţinutul principal

Recapitulare pentru BAC

Lecția 2: Ecuații trigonometrice

Folosirea formulelor trigonometrice pentru sume de unghiuri

Calculează cosine, left parenthesis, angle, B, A, C, minus, 60, degrees, right parenthesis.

(Varianta 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
(Varianta 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
(Varianta 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
(Varianta 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

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