Question: Let u and v be two nonzero vectors. (a) Is it possible for the component of u along v to have the opposite sign from

Let u and v be two nonzero vectors.
(a) Is it possible for the component of u along v to have the opposite sign from the component of v along u? Why or why not?
(b) What must be true of the vectors if either of these two components is 0?

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