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Консультация № 196546
03.10.2019, 01:27
0.00 руб.
1
1
1
Здравствуйте! У меня возникли сложности с таким вопросом:
Найти модуль разности векторов |a - b| и косинус угла α между векторам а и b. Ответ округлить до двух значащих цифр.
Сделать рисунок.
Найти модуль разности векторов |a - b| и косинус угла α между векторам а и b. Ответ округлить до двух значащих цифр.
Сделать рисунок.
Прикрепленные файлы:
Обсуждение
03.10.2019, 08:34
общий
это ответ
Здравствуйте, dar777!
В соответствии с Вашим рисунком имеем
-- для вектора
-- начало вектора; 
-- конец вектора; 
-- координаты вектора; 
(ед. длины) -- длина вектора;
-- для вектора
-- начало вектора; 
-- конец вектора; 
-- координаты вектора; 
(ед. длины) -- длина вектора;
-- для вектора
-- координаты вектора; 
(ед. длины) -- длина вектора;
-- скалярное произведение векторов 
и 
-- угол между векторами и 
Ответ:
ед. длины; 
Литература
Письменный Д. Т. Конспект лекций по высшей математике. В 2 ч. Ч. 1. -- М.: Айрис-пресс, 2007. -- 288 с.
Вашего рисунка достаточно для решения задачи.
Примечание. Вместо точки, расположенной посередине высоты строки, для обозначения умножения мной была использована точка, расположенная внизу строки.
В соответствии с Вашим рисунком имеем
-- для вектора
-- начало вектора; -- конец вектора; -- координаты вектора; (ед. длины) -- длина вектора;-- для вектора
-- начало вектора; -- конец вектора; -- координаты вектора; (ед. длины) -- длина вектора;-- для вектора
-- координаты вектора; (ед. длины) -- длина вектора; -- скалярное произведение векторов и -- угол между векторами и Ответ:
ед. длины; Литература
Письменный Д. Т. Конспект лекций по высшей математике. В 2 ч. Ч. 1. -- М.: Айрис-пресс, 2007. -- 288 с.
Вашего рисунка достаточно для решения задачи.
Примечание. Вместо точки, расположенной посередине высоты строки, для обозначения умножения мной была использована точка, расположенная внизу строки.
5
Это самое лучшее решение!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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