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coolkat4
 2 years ago
Find the angle between the given vectors to the nearest tenth of a degree. u = <6, 1>, v = <7, 4>?
coolkat4
 2 years ago
Find the angle between the given vectors to the nearest tenth of a degree. u = <6, 1>, v = <7, 4>?

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

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

amistre64
 2 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
 2 years ago
Best ResponseYou've already chosen the best response.0i remember the formula how do i plug the numbers into the formula?

amistre64
 2 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
 2 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
 2 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
 2 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
 2 years ago
Best ResponseYou've already chosen the best response.0the 38 came from 42+(4)

amistre64
 2 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
 2 years ago
Best ResponseYou've already chosen the best response.21*4 is +4, and i did a +5 :)

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

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

amistre64
 2 years ago
Best ResponseYou've already chosen the best response.2http://www.wolframalpha.com/input/?i=arccos%2848%2Fsqrt%2837*65%29%29
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