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Find unit vectors along overset(rarr)A=...

Find unit vectors along `overset(rarr)A=hat I + hat j - 2 hat k` and `overset(rarr)B=hat I +2 hat j -hat k`

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unit vector along `overset(rarr)A, overset(rarr)A=(overset(rarr)A)/(|overset(rarr)A|)=(hati +hat j-2 hatk)/sqrt(1^(2)+1^(2)+(-2)^(2) =(hati+hatj-2hatk)/sqrt(6)`
unit vector along `overset(rarr)A,overset(rarr)B=(hat B)/(|overset(rarr)B|)=(hati + 2hatj-hatk)/sqrt(1^(2)+1^(2)+(-1)^(2))=(hat i+2 hat j-hatk)/sqrt(6)`
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