Find the unit vector in the direction of the vector `veca=hati+hatj+2hatk`.

Explanation

The unit vector `veca` in the direction of vector
`veca=hati+hatj+2hatk` is given by `hata=(veca)/(|a|)`.
`" "|veca|=sqrt(1^(2)+1^(2)+2^(2))=sqrt(1+1+4) =sqrt(6)`
`therefore" "hata=(veca)/(|veca|)=(hati+hatj+2hatk)/(sqrt(6)) = (1)/(sqrt6) hati+(1)/(sqrt6) hatj+(2)/(sqrt6) hatk`