SOLUTION: u: <3, -1> v: <4, 3> w: <&#8532; , -8/9 > What is the angle between v and w? A.) 0 B.) 30 C.) 60 D.) 90

Algebra ->  Test -> SOLUTION: u: <3, -1> v: <4, 3> w: <&#8532; , -8/9 > What is the angle between v and w? A.) 0 B.) 30 C.) 60 D.) 90      Log On


   

Question 1071151: u: <3, -1>
v: <4, 3>
w: <⅔ , -8/9 >
What is the angle between v and w?
A.) 0
B.) 30
C.) 60
D.) 90
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
v%2Aw=4%282%2F3%29%2B3%28-8%2F9%29=8%2F3-8%2F3=0
You must know that a zero dot product
means that the vectors are orthogonal,
meaning that the angle between them is 90%5Eo .