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°.
ABC=2*4*3=24
....................
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Hey!
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Solution:
= -2.1 + 0.3 + -1.7 + -0.4
= -1.8 + -1.7 + -0.4
= -3.5 + -0.4
= -3.9
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Answer:
a) -3.9
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Hope This Helped! Good Luck!
Answer:
y=10
Step-by-step explanation:
A line is 180°
6x10=60
120+60=180
Hope this helps :)