Ответ:
cos =
Объяснение:
вектори мають координати
AB (5,10,-10), AC(-2,3,8)
cos=·
AB*AC= -10+30-80=60
|AB|*|AC|=*=25*
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Ответ:
cos
=
Объяснение:
вектори мають координати
AB (5,10,-10), AC(-2,3,8)
cos
=·
AB*AC= -10+30-80=60
|AB|*|AC|=
*
=25*