?For the following exercises, find the measure of the angle between the
Chapter 2, Problem 140(choose chapter or problem)
For the following exercises, find the measure of the angle between the three-dimensional vectors a and b. Express the answer in radians rounded to two decimal places, if it is not possible to express it exactly.
[T] a = 3i − j + 2k, b = v − w, where v = 2i + j + 4k and w = 6i + j + 2k
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