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Консультация № 196819
25.10.2019, 22:11
0.00 руб.
28.10.2019, 03:26
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
Найти модуль разности векторов |a- - b-| и косинус угла α между векторами а- и b-. Ответ округлить до двух значащих цифр.
Найти модуль разности векторов |a- - b-| и косинус угла α между векторами а- и b-. Ответ округлить до двух значащих цифр.
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Обсуждение
30.10.2019, 17:14
общий
это ответ
Здравствуйте, dar777!
Из приведённого рисунка видно, что вектор a начинается в точке (1, 3) и заканчивается в точке (4, 7), то есть имеет координаты {4-1, 7-3} = {3, 4}. Аналогично, для вектора b имеем координаты {7-2, 4-2} = {5, 2}. Тогда
Из приведённого рисунка видно, что вектор a начинается в точке (1, 3) и заканчивается в точке (4, 7), то есть имеет координаты {4-1, 7-3} = {3, 4}. Аналогично, для вектора b имеем координаты {7-2, 4-2} = {5, 2}. Тогда
5
Это самое лучшее решение!
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