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OpenStudy (anonymous):
find a unit vector orthogonal to -5i+8.9j+7.9k.
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OpenStudy (anonymous):
I think it is a linear algebra question
OpenStudy (anonymous):
First you find any vector that has a dot product of zero with your vector - I think 8.9i + 5j will work. Then you have to normalize it - that is, divide it by its magnitude, to make it into a unit vector.
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