AnswersNC-Math 4 CRVector Addition and Subtraction

Vector Addition and Subtraction Answers

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1
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What is sum of the vectors, and ?

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2
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Given |u| = 10 at ∠135° and |v| = 5 at ∠30°, what expression can be used to find |u + v|?

A
(10)2 + (5)2 – 2(10)(5) cos(45°)
B
(10)2 + (5)2 – 2(10)(5) cos(75°)
C
(10)2 + (5)2 – 2(10)(5) cos(105°)
D
(10)2 + (5)2 – 2(10)(5) cos(165°)
3

Consider the following vectors: .What is the vector for 3u + v – 2w in component form?

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