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January 31, 2015

January 31, 2015

Posted by **Gary** on Wednesday, March 31, 2010 at 1:10am.

Find the angle ϴ between the vectors.

u=3i-3j, v=-2i+2√3j

- math -
**drwls**, Wednesday, March 31, 2010 at 9:27amThe magnitude of u is sqrt 18.

The magnitude of v is 4

The dot product of u and v is

u*v = -6 -6sqrt3

= -6(1+sqrt3)

The cosine of the angle between the vectors is

(u*v)/|u||v|

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