Find u v, where is the angle between u and v. 1. u = 4,

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Find u ∙ v, where  is the angle between u and v.
1. ∥u∥ = 4, ∥v∥ = 10, θ = 2π/3
2. ∥u∥ = 4, ∥v∥ = 12, θ = π/3
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