Question 1204a

Vectors I: Basics, Dot and Cross Products
Lengths of Projection

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Given the vectors a=(362){\mathbf{a}=\begin{pmatrix} - 3 \\ 6 \\ 2 \end{pmatrix}} and b=(340),{\mathbf{b}=\begin{pmatrix} 3 \\ 4 \\ 0 \end{pmatrix},} what is the length of projection of a{\mathbf{a}} onto b?{\mathbf{b}?}

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