anonymous
  • anonymous
Excuse me, please 3 vectors (they are not 0), |a|=5 |b|=3 the angle between a and b is 60 to balance , |c|=?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
|dw:1361102188359:dw|
anonymous
  • anonymous
@ParthKohli can you help?
ParthKohli
  • ParthKohli
No, I am not well-versed in vectors :-(

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ZeHanz
  • ZeHanz
Try putting a coordinate system on it, with a or b as one of the axes. Let's say b is the negative x-axis. Then you can write a as the sum of its x- and y-components. I will make a drawing to explain...
anonymous
  • anonymous
thanks @ParthKohli , cuz there was nobody viewing, and I'm your fan, so I tried to ask you. that's alright, thanks for replying
anonymous
  • anonymous
thanks , @ZeHanz , I'll wait for your illustration.
ZeHanz
  • ZeHanz
Here it is: (try to get the lengths of a_x and a_y, the x and y components of a.
1 Attachment
ZeHanz
  • ZeHanz
Once you have these values, you can add up all the x-components (there are 2). There is also only one y-component (that of a). To get c, you'll have to compensate in the opposite direction, so take the opposite values of the x- and y-components. Hope this is clear enough ;)
anonymous
  • anonymous
cool how did you draw that? tks a lot, in your way that I'll get c=5.5, is it? but the answer is 7, am I misunderstanding or? sorry for being confused ,still your pic is very clear
anonymous
  • anonymous
oh sorry, wrong considering , give me a moment
ZeHanz
  • ZeHanz
I used Geogebra. Look it up at geogebra.org (it's free).
anonymous
  • anonymous
ok , my bad ,i got 7
anonymous
  • anonymous
thank you very much, i was stupidly stuck, and thanks for telling me the app, i think it will be useful
ZeHanz
  • ZeHanz
Here's another drawing. The sum of the x-components is -5 + -2.5 = -7.5. The only y-component is 2.5√3. (there is a 30-60-90-triangle involved). So to compensate, c should go 5.5 to the right and 2.5√3 down: (lenght is indeed 7!)
1 Attachment
anonymous
  • anonymous
yeah i got 7 when i told you i got it, thank you very much sorry for having a wrong considering at first, i can't thank you enough for your patience and enthusiasm of answering me. i can imagine what's going on when you gave me first picture. thaks again
ZeHanz
  • ZeHanz
You're welcome!

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