Find the Angle Between the Vectors $\mathbf { u }$ And $\mathbf { v }$

Find the angle between the vectors $\mathbf { u }$ and $\mathbf { v }$ . Express your answer in degrees and round to the nearest tenth of a degree.
$$\mathbf { u } = - 6 \mathbf { i } + 9 \mathbf { j } + 2 \mathbf { k } , \mathbf { v } = - 3 \mathbf { i } - 7 \mathbf { j } - 4 \mathbf { k }$$

A) $29.3 ^ { \circ }$
B) $34.1 ^ { \circ }$
C) $60.7 ^ { \circ }$
D) $90 ^ { \circ }$
E) $124.1 ^ { \circ }$

Correct Answer:

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