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Bergamotte
@Bergamotte
July 2022
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Найдите угол между векторами AB и CD, если A (1; 1; 2), В (0; 1; 1), С (2; -2; 2) и D (2; -3;1).
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lyubashaatata
AB { -1; 0 ; -1} СD {0; -1 ; -1}
|AB| = \sqrt{2}, |CD| = \sqrt{2}
cosα = \frac{0 + 0 +1}{ \sqrt{2}* \sqrt{2} } = \frac{1}{2}
\alpha = 60°
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Answers & Comments
|AB| = \sqrt{2}, |CD| = \sqrt{2}
cosα = \frac{0 + 0 +1}{ \sqrt{2}* \sqrt{2} } = \frac{1}{2}
\alpha = 60°