Determine whether each statement is true or false. If a statement is true, give a reason or cite an appropriate statement from the text. If a statement is false, provide an example that shows the statement is not true in all cases or cite an appropriate statement from the text.(a) If v is a nonzero vector in Rn, then the unit vector in the direction of v is u = ||v||/v.(b) If u ∙ v < 0, then the angle θ between u and v is acute.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter8: Applications Of Trigonometry
Section8.3: Vectors
Problem 37E
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Determine whether each statement is true or false. If a statement is true, give a reason or cite an appropriate statement from the text. If a statement is false, provide an example that shows the statement is not true in all cases or cite an appropriate statement from the text.
(a) If v is a nonzero vector in Rn, then the unit vector in the direction of v is u = ||v||/v.
(b) If u ∙ v < 0, then the angle θ between u and v is acute.

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