A community for students.
Here's the question you clicked on:
 0 viewing
coolkat4
 3 years ago
Find the angle between the given vectors to the nearest tenth of a degree. u = <6, 1>, v = <7, 4>?
coolkat4
 3 years ago
Find the angle between the given vectors to the nearest tenth of a degree. u = <6, 1>, v = <7, 4>?

This Question is Closed

coolkat4
 3 years ago
Best ResponseYou've already chosen the best response.0thats no possiable as one of the given solutions..

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.2theres a relationship between cos and dot products, do you recall it?

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.2then the angle is simple to be found knowing:\[uvcos~\alpha=u \cdot v\]

coolkat4
 3 years ago
Best ResponseYou've already chosen the best response.0i remember the formula how do i plug the numbers into the formula?

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.2you know how to do a dot product right? and to find lengths of vectors?

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.2those are the numbers you need then, what do you get for: u.v and the lengths of u and v ?

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.2u = <6, 1>; sqrt(37) v = <7, 4>; sqrt(65)  u.v 42+5 = 49 uv = sqrt(37*65) .... what does 38 mean?

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.2\[\cos~\alpha=\frac{u.v}{uv}\] \[\cos~\alpha=\frac{49}{\sqrt{37*65}}\] \[\alpha=cos^{1}\frac{49}{\sqrt{37*65}}\]

coolkat4
 3 years ago
Best ResponseYou've already chosen the best response.0the 38 came from 42+(4)

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.2lol ... i do tend to add when i need to multiply when doing that

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.21*4 is +4, and i did a +5 :)

coolkat4
 3 years ago
Best ResponseYou've already chosen the best response.0okay thank you i got 20.28?

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.2i got something closer to 10

amistre64
 3 years ago
Best ResponseYou've already chosen the best response.2http://www.wolframalpha.com/input/?i=arccos%2848%2Fsqrt%2837*65%29%29
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.