Answers Precalculus Dot Product and Work — Unit testQuestion 16

16

QuizMultiple Choice

Dot Product and Work — Unit test

Question 16 of 25 • Precalculus

Let |u| = 4 at an angle of 210° and |v| = 9 at an angle of 315°, and w = u – v. What is the magnitude and direction angle of w?

Answer

A

|w| = 5.5; θ = 156.1°

B

|w| = 5.5; θ = 203.9°

C

|w| = 10.8; θ = 156.1°

D

|w| = 10.8; θ = 203.9°

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