Answer:
1. )
2.) The angle between v and u is 147.52°.
Step-by-step explanation:
Given:

To Find:
1. 
2.
Solution:
is scalar product given as,



Here only i.i = j.j =1 and i.j = j.i = 0
∴ 
Now, Substituting the above values we get

As it is negative mean
is in Second Quadrant Because Cosine is negative in Second Quadrant.
1. )
2.) The angle between v and u is 147.52°.