Find a unit vector in the same direction as a= (4,-5,-5)

L = sqrt (4^2+(-5)^2+(-5)^2)

= sqrt (66)

unit vector in the same direction as a= (4,-5,-5) is ( 4/ sqrt (66), -5/sqrt (66), -5/sqrt (66)

Please let me know if you have any questions and best me if you are satisfactory.

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