Question 1201b

Vectors I: Basics, Dot and Cross Products
Unit Vectors

Question

Find a^,{\mathbf{\hat{a}},} the unit vector in the direction of
a=−2i+j+2k.\mathbf{a} = - 2 \mathbf{i} + \mathbf{j} + 2 \mathbf{k}.

Attempt

a^={\hat{a}= }
({\Biggl(}
){\Biggr)}

Answer

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