Find λ, when the projection of 
on 
is 4 units.
Given 
and 
Projection of 
on 
is given by 
=2
+6+12
=2λ+18
Now, |b|=
=
=7
2λ+18=28
2λ=10
λ=5
1
Find λ, when the projection of on is 4 units.
Given and
Projection of on is given by
=2+6+12
=2λ+18
Now, |b|= ==7
2λ+18=28
2λ=10
λ=5