Asked by Anonymous
Find the magnitude and direction of the vector u=<-7,9>
Answers
Answered by
oobleck
|u| = √(7^2 + 9^2) = √(49+81) = √130
direction is θ where
tanθ = 9/-7 in QII
θ = 180-52.125° = 127.875°
direction is θ where
tanθ = 9/-7 in QII
θ = 180-52.125° = 127.875°
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