What is the dot product of <3,4,1 ><3,4,1> and <5,-1,2 ><5,−1,2>?
1 Answer
Dec 19, 2015
13
Explanation:
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Dot product is distributive.
(e.g.a*(b+c)=a*b+a*ca⋅(b+c)=a⋅b+a⋅c ) -
Dot product of 2 vectors that are perpendicular is zero
(e.g.hati*hatj=0ˆi⋅ˆj=0 )