Pre-Calculus, 9th edition
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a)
The vectors are and .
Dot product definition:
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(b)
Find the angle between and .
Cosine of the angle between two vectors: .
Find magnitude of vector : .
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Find magnitude of vector : .
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Apply formula: .
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c)
Dot product of the vectors , so the vectors are orthogonal.
The vectors are orthogonal.
a) .
b) The angle .
c) The vectors are orthogonal.
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