Calculate the Angle Between $\mathbf { a }$ And $\mathbf { b }$

question 2

Short Answer

Calculate the angle between $\mathbf { a }$ and $\mathbf { b }$ (correct to the nearest degree).
$$\mathbf { a } = 3 \mathbf { i } - 2 \mathbf { j } , \mathbf { b } = - 7 \mathbf { j } + \mathbf { k }$$

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