Предмет: Математика, автор: AnastasiaEdu200

Даны координаты 4 точек а(-6;1;-1), в(2;-1;-1),с(3;2;1),д(1;3;-2).
Найти :а) координаты векторов АБ,СД, 2АБ+3СД; б) модули векторов АБ,СД в) скалярное произведение АБ И СД.

ПОЖАЛУЙСТА :(

Ответы

Автор ответа: mikhailpanfilk

координаты векторов: АВ (4,-2,0),СД (0,2,2) cos(a)=-4/sqrt(160)=-1/sqrt(10) a=пи-arccos1/sqrt(10)-угол между искомыми векторами.(по моему так должно получится)но это не точно

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Даны координаты 4 точек а(-6;1;-1), в(2;-1;-1),с(3;2;1),д(1;3;-2). Найти :а) координаты векторов АБ,СД, 2АБ+3СД; б) модули векторов АБ,СД в) скалярное произведение АБ И СД. ПОЖАЛУЙСТА :(

Ответы

Даны координаты 4 точек а(-6;1;-1), в(2;-1;-1),с(3;2;1),д(1;3;-2).
Найти :а) координаты векторов АБ,СД, 2АБ+3СД; б) модули векторов АБ,СД в) скалярное произведение АБ И СД.

ПОЖАЛУЙСТА :(