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°.
a) The arrangement of 9 paintings can be done 9 ways.
b) The arrangement of the 4 out of 9 paintings will be done as 21 ways.
<h3>What is the combination?</h3>
The arrangement of the different things or numbers in a number of ways is called the combination.
a) Here if she has 9 paintings so the number of the arrangements will be
b) The arrangement of the 4 out of 9 paintings will be
Therefore the arrangement of 9 paintings can be done 9 ways and the arrangement of the 4 out of 9 paintings will be done as 21 ways.
To know more about combinations follow
#SPJ1