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.
$$\mathbf { u } = \langle - 3,6,3 \rangle , \mathbf { v } = \langle 9,9,9 \rangle$$

A) $25.2 ^ { \circ }$
B) $28.1 ^ { \circ }$
C) $64.8 ^ { \circ }$
D) $90 ^ { \circ }$
E) $61.9 ^ { \circ }$

Correct Answer:

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