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dot product

Dot Product

In two dimensions, (ai + bj)•(ci + dj) = ac + bd. In three dimensions, (ai + bj + ck)•(di + ej + fk) = ad + be + cf. In either case, uv = |u||v| cos θ, where θ is the angle between the vectors.

 

 

See also

Cross product, triple product, cosine

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