SOLUTION: given a=2i-j+2k and b=i+3j-2k, find
a) the cosine of the angle between the two vectors
b) |axb|
Algebra.Com
Question 921219: given a=2i-j+2k and b=i+3j-2k, find
a) the cosine of the angle between the two vectors
b) |axb|
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
 \times 3 + 2 \times (-2) = -5)
Also, 
where theta is the angle in between vectors a and b.
Find the magnitude of a and b, solve for theta and you're done.
Then use the fact that 
and find 
.
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