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Find the magnitude of the vector vec(A)=...

Find the magnitude of the vector `vec(A)=hati-2hatj+3hatk`.Also find the unit vector in the direction of `vec(A)`.

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Magnitude of `vec(A),A=sqrt(1^2+(-2)^2+3^2)=sqrt(14)`
Unit vector in the direction of `vec(A)` is
`hatn =(vec(A))/(A)=1/sqrt(14)=hati-2/sqrt(14)hatj+3/sqrt(14)hatk`.
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