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anonymous
 4 years ago
The magnitudes of the vectors shown are I U I = 8 and I V I= 3. The vector V is vertical. Graphically determine the magnitude of the vector U  2V.
anonymous
 4 years ago
The magnitudes of the vectors shown are I U I = 8 and I V I= 3. The vector V is vertical. Graphically determine the magnitude of the vector U  2V.

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327371116945:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0How to solve this problem ? Guys Thanks

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0is your question this

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1dw:1327371324663:dw

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1im assuming v is up too

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1dw:1327371386093:dw

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1law of cosines ar any rate

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1c^2 = 8^2 + 6^2 2.8.6 cos(45)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327371436761:dw

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1then change it to the up direction and we get 45+90 as the angle istead of 45

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1dw:1327371556791:dw

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1if we know 2 sides and the angles between them the law of cosines from trig gives us the third side

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.145+90 = 135 so that just the only thing that chagnes from before

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1c^2 = 8^2 + 6^2 2.8.6 cos(135)

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1v is just the opposite direction; and 2 is stretched twice as far; 3+3 = 6

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0in the book is given only the answer and the answer is that in the book I U  2V I = 5.7

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1that may be; what does the law of C give us?

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1the wolf say that gives us 12.9

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.15.66 if v is pointing up

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0there is no rule in the question :(

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1so either you meant the v is pointing up; and we get 5.66 or the book is wrong

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1dw:1327371929000:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327382757289:dw

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1vectors are defined by length and direction

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0How did you get 5.66?

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1if v pointed up then 2v points down and we get u2v = 5.7

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1law of cosines; thats been posted

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1i cant recall the dot version of it tho

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0can you do the step of it please ?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0R^2=6^2+8^22*6*8*cos135 R=12.95

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1we know 2 sides, u and 2v u = 8, 2v = 6 u2v^2 = u^2 + v^2 2uv cos(t)

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1since t = 45 as we originally thought; just plug it in :) and we get 5.66

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1i missed a few typos in there but hopefully you get the picture :)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i followed your steps but I didn't get the same answer

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1or .... u = <8,8> v = <0,3> u = <8,8> 2v = <0,6>  <8,2> sqrt(8^2+2^2) = sqrt(68) ..... ugh, that aint 5.7 either is it

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1http://www.wolframalpha.com/input/?i=sqrt%288%5E2+%2B+6%5E2+2.8.6+cos%2845%29%29

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1my us off; forgot how to get a 45 :)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Oh i see now Thank you so much that was very helpful :)

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1sqrt(2) = 8 1 = c c = 4sqrt(2) thas prolly better

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1u = <4.2,4.2> v = < 0 , 3 > u = <4.2,4.2> 2v = < 0 , 6>  <4.2, 4.26> sqrt(32+36+3224.2) hopefullt i did that right; assume .2 means sqrt(2)

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1http://www.wolframalpha.com/input/?i=sqrt%28%284sqrt%282%29%29%5E2%2B%284sqrt%282%296%29%5E2%29 yeah, when I actually do it right it works out the same :)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0so we didn't use cosine in this problem

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1we didnt have to, but it was the first idea i had until this one popped up

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1there more than one way to skin this problem

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0but we have 8 in U not 4

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1dw:1327372925034:dw

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1the length of the vector and its angle lets me know how to construct its component parts when I do it right

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0is V up or down in your question

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1the answer key would suggest its up to begin with otherwise we cant get the 5.7

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1we still had to use some trig, or maybe this is geometry to get the results we wanted tho.

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.1youre welcome, it was worth the practice :)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327384535229:dw
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