SOLUTION: Determine the direction angle for the following vector: v = -8i+8 sqrt(3) j https://www.dropbox.com/s/5iqqb7kjtt0a4ua/Screen%20Shot%202017-11-21%20at%209.20.33%20AM.png?dl=0

Question 1102243: Determine the direction angle for the following vector:
v = -8i+8 sqrt(3) j
https://www.dropbox.com/s/5iqqb7kjtt0a4ua/Screen%20Shot%202017-11-21%20at%209.20.33%20AM.png?dl=0
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Determine the direction angle for the following vector:
v = -8i+8 sqrt(3) j
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Note that v is in QII where the tan is negative::
theta = arctran[(8sqrt(3)/-8] = arctran[-sqrt(3)] = 180-60 = 120 degrees
or (2/3)pi radians
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Cheers,
Stan H.
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