Find the angle between the given vectors to the nearest tenth of a degree.
u = <2, -4>, v = <3, -8>

Find the angle between the given vectors to the nearest tenth of a degree.
u = <2, -4>, v = <3, -8>

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I tried everything, but I'm not getting the answer I need...

\[ \cos \theta = \frac {a \cdot b} {|a| |b| } \]
take the arccos to find \[ \theta\]

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