Предмет: Геометрия, автор: lenovo780bl

1.знайти кут між векторами CA і DB якщо А(2;-1;корінь з 2); B(1;-2;0); С(1;-3;0); D(2;-2;0)

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Автор ответа: DAVAlinka

13

Ответ:П - arccos(корень из 6/6)

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