How do you find the sum of the unit vectors #(-9,12,-5)# and #(6,5,-5)#? Precalculus Vectors in the Plane Unit Vectors 1 Answer Alan P. Jul 28, 2016 #(-9,12,-5)# and #(6,5,-5)# are not unit vectors; therefore this question is meaningless. Answer link Related questions What is a unit vector? How do I find the unit vector of a plane? How do I calculate a unit vector? How do I multiply two unit vectors? What are unit vectors used for? What is a direction vector? What does it mean to normalize a vector? How do you find the principal unit normal vector to the curve at the specified value of the... An airplane has an airspeed of 500 kilometers per hour bearing N45°E. The wind velocity is 60... How do you find a unit vector that is orthogonal to a and b where #a = −7 i + 6 j − 8 k# and ... See all questions in Unit Vectors Impact of this question 1534 views around the world You can reuse this answer Creative Commons License