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 one year ago
Find the angle between the given vectors to the nearest tenth of a degree. u = <6, 1>, v = <7, 4>?
 one year 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
 one year ago
Best ResponseYou've already chosen the best response.0thats no possiable as one of the given solutions..

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

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

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

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

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

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

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

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

amistre64
 one year 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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