Question: Let a = [1, 1, 0], b = [3, 2, 1], and c = [1, 0, 2]. Find the angle between: Deduce the law of

Let a = [1, 1, 0], b = [3, 2, 1], and c = [1, 0, 2]. Find the angle between:

Deduce the law of cosines by using vectors a, b, and a - b.

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