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Babynini
 one year ago
Find length and direction of u
u = <4 (sqrt3),4>
Babynini
 one year ago
Find length and direction of u u = <4 (sqrt3),4>

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Babynini
 one year ago
Best ResponseYou've already chosen the best response.0The initial point is (0,0)dw:1434670266004:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1u = <a,b> length of u = u = sqrt(a^2+b^2) this is the same as saying "the magnitude of vector u"

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1direction: theta = arctan(b/a) if theta is negative, and you know for a fact that the vector is in Q2, then add on 180 degrees

Babynini
 one year ago
Best ResponseYou've already chosen the best response.0oh, I didn't make that connection! ok.

Babynini
 one year ago
Best ResponseYou've already chosen the best response.0and I didn't know that about direction at all xD thanks :) let me get the answers real quick.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1I agree with the length, but not the direction

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1b/a = 4/(4*sqrt(3)) = 0.57735026918962 arctan(b/a) = arctan(0.57735026918962) = 29.9999999999998 which is essentially 30 add on 180 30+180 = 150

Babynini
 one year ago
Best ResponseYou've already chosen the best response.0hrm when I do = arctan (4/(4 sqrt3)) it comes out to = 0.52

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you must be in radian mode

Babynini
 one year ago
Best ResponseYou've already chosen the best response.0Yeah you're right, I was.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1if you're using desmos, then click the wrench to change to degree mode

Babynini
 one year ago
Best ResponseYou've already chosen the best response.0Scientific calculator :) thanks though, I use desmos as well.
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