Hello, I am having extreme difficulty in starting this problem. Seeing what we are given I thought maybe to find the scalar projection of v on to u and u on to v would help, but that didn't seem to get me anywhere. Thanks.
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yeah, the scalar projection is overkill for this problem. What you really need for this is some of the basic facts about the dot product that we've been talking about in class: 1) that scalar multiplication commutes with the dot product, i.e. (λu).v = u.(λv) = λ(u.v) for a scalar λ, 2) that the dot product satisfies the distributive law, 3) and u.u = ||u||^2 . So, what are the scalars in the expression in the problem?
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