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What is unit vector?...

What is unit vector?

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What is the unit vector in the direction of veca=veci+vecj+2veck ?

If P(-1,2) and Q(3,-7) are two points, express the vector PQ in terms of unit vectors hati and hatj also, find distance between point P and Q . What is the unit vector in the direction of PQ ?

If veca is a nonzero vector of magnitude 'a' and lambda a nonzero scalar, then lambdaveca is unit vector if:

If vec a is a non-zero vector of magnitude ‘a’ and λ a non-zero scalar, then λ vec a is unit vector if λ =1

If vec a is a non-zero vector of magnitude ‘a’ and λ a non-zero scalar, then λ vec a is unit vector if λ = - 1

If vec a is a non-zero vector of magnitude ‘a’ and λ a non-zero scalar, then λ vec a is unit vector if a = |λ|

If vec a is a non-zero vector of magnitude ‘a’ and λ a non-zero scalar, then λ vec a is unit vector if a = 1/ |λ|

If veca is a non-zero vector of modulus a and m is a non-zero scalar, then mveca is a unit vector if