Assume that v = 3, w = 5, and the angle between v and w is
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Assume that ΙΙvΙΙ = 3, ΙΙwΙΙ = 5, and the angle between v and w is θ = π/3.
(a) Use the relation ΙΙv + w ΙΙ2 = (v + w) · (v + w) to show that ΙΙv + wΙΙ 2 = 32 + 52 + 2v · w.
(b) Find ΙΙv + wΙΙ.
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