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 ΙΙ= (v + w) · (v + w) to show that  ΙΙv + wΙΙ 2 = 32 + 52 + 2v · w.
(b) Find ΙΙv + wΙΙ.

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Calculus

ISBN: 9781319055844

4th Edition

Authors: Jon Rogawski, Colin Adams, Robert Franzosa

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