1) From a = 4i - 6j + 5k, and b = 2j - k find the following:

a) a + b =_____

b) 2a + 3b =_____

c) IaI =_____

d) Ia - bI =_____

2) Find the direction cosines and direction angles of the vector. (to the nearest degree).

a) cos() =____

b) cos() =____

c) cos() =____

d) =____

e) =____

f) =____

3) Find the scalar and vector projections of b onto a.

a = , b =

a) Scalar projection of b onto a =_______

b) Vector projection of b onto a =_______

4)