- #1
sunmaz94
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Homework Statement
Find the angle between the vectors [-1, 1, 2] and [2, 1, -1].
Homework Equations
cos(theta) = <u, v> / ||u||||v||
The Attempt at a Solution
I get <u, v> = -3 and both norms equal to the square root of six. Then cos(theta) equals (-1/12), but I don't think this is correct. Can someone find my careless error? Thanks.