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OpenStudy (anonymous):
Find the angle between the given vectors to the nearest tenth of a degree. u = <8, 4>, v = <9, -9>
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OpenStudy (anonymous):
the answer choices are; 81.6° 25.8° 35.8° 71.6°
OpenStudy (amistre64):
youll need to know the dot product, and the length of each vector ... \[cos(\alpha)=\frac{u\cdot v}{|u||v|}\]
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