Proposition 2.2.1

Proposition 2.2.1
Let 0 ≤ θ ≤ π be the (measure of the) angle between the vectors u and v. Then u * v = |u||v|cos(θ).
Drag the vectors u and v. Check out the relationship between u * v and |u||v|cos(θ).

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Kelly Shattuck, July 31, 2008, Created with GeoGebra