Let v be a nonzero vector. The angles , , between v and the unit vectors
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Let v be a nonzero vector. The angles α, β, γ between v and the unit vectors i, j, k are called the direction angles of v (Figure 30). The cosines of these angles are called the direction cosines of v. Prove that
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cos² a + cos² B+ cos² y = 1
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We use the relation between the dot product and the angle between two vectors to write vi vi ...View the full answer
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