2 Projection of a vector ar  on other vector b
r , is given by
a bˆ,
r⋅
   or   
,  or  1
(
)
|
|
|
|
b
a
a b
b
b
⎛
⎞
⋅
⋅
⎜
⎟
⎝
⎠
r
r
r
r
r
r
3 If  θ = 0, then the projection vector of AB
uuur
 will be AB
uuur
 itself and if θ = π, then the
projection vector of AB
uuur
 will be BA
uuur 4