Find the dot product of $\vec { u } = \langle 1,2,3 \rangle$ and $\vec { v } = \langle 2,1,1 \rangle$ and the cosine of the angle between them.

Name: Find the dot product of $\vec { u } = \langle 1,2,3 \rangle$ and $\vec { v } = \langle 2,1,1 \rangle$ and the cosine of the angle between them.
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The Answer of Find the dot product of $\vec { u } = \langle 1,2,3 \rangle$ and $\vec { v } = \langle 2,1,1 \rangle$ and the cosine of the angle between them.

Find the Dot Product Of u⃗=⟨1,2,3⟩\vec { u } = \langle 1,2,3 \rangleu=⟨1,2,3⟩

Find the Dot Product Of $\vec { u } = \langle 1,2,3 \rangle$