If 
is a nonzero vector of magnitude ‘a’ and λ a nonzero scalar, then 
is unit vector if
Given λ
is a unit vector.
And 
Since 
∴ 
λ
is a unit vector if a = 1/|λ|
20
If is a nonzero vector of magnitude ‘a’ and λ a nonzero scalar, then is unit vector if
Given λ is a unit vector.
And
Since
∴
λ is a unit vector if a = 1/|λ|