Основное содержание

Тригонометрия

Урок 5: Формулы сложения углов

Использование формул сложения аргументов

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

(Выбор 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
(Выбор 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
(Выбор 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
(Выбор 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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