Предмет: Геометрия, автор: wseznaika53

знайдіть кут між векторами a i b якщо a(-2;-2;2) b(2;2;1)
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Ответы

Автор ответа: Аноним
23

Скалярное произведение а и в рано -4-4+2=-6

модуль вектора а равен √(4+4+4)=2√3

Модуль вектора в равен √(4+4+1)=3

Косинус угла между векторами а и в равен -6/(3*2√3)=-1/√3=-√3/3

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