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Math problem

Nyxathid
By Nyxathid
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http://gyazo.com/0032b5b6fcb57ae1b17861ef1a66421e 

 

So i have to discover X . Where y+a=20M, but since im retarded i cant do this easy math problem, hmm.. i hope you undrestand :P

I would help you, but the screenshot is not working

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@Minibois

Add ".png" to it.

Oh yeah, it's one of those links where they have an extra space at the end :P

 

 

So i have to discover X . Where y+a=20M, but since im retarded i cant do this easy math problem, hmm.. i hope you undrestand :P

 

New link : http://gyazo.com/0032b5b6fcb57ae1b17861ef1a66421e

I don't get it.. What is x suppose to be?!  :blink:

"We're all in this together, might as well be friends" Tom, Toonami.

 

mini eLiXiVy: my open source 65% mechanical PCB, a build log, PCB anatomy and discussing open source licenses: https://linustechtips.com/topic/1366493-elixivy-a-65-mechanical-keyboard-build-log-pcb-anatomy-and-how-i-open-sourced-this-project/

 

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@Minibois

Add ".png" to it.

It's still not functional.

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How easy is this supposed to be, because the only way I can get that answer with my tiny brain is:

 

x=y*cos48+a*cos30

x=(y+a)*cos48*cos30

x=20*cos48*cos30=11.589

 

but I feel like I am seriously overthinking this one.

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How easy is this supposed to be, because the only way I can get that answer with my tiny brain is:

 

x=y*cos48+a*cos30

x=(y+a)*cos48*cos30

x=20*cos48*cos30=11.589

 

but I feel like I am seriously overthinking this one.

x=y*cos48+a*cos30

x=(y+a)*cos48*cos30

x=y*cos48*cos30+x*cos48*cos30

 

This doesn't work.

 

And is this how automatic text color is supposed to work? Because my text now has a white background and it's really annoying.

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If the triangles meet in the each other in the middle of X than is X =15.099

Are you sure you gave us all information? It's not an easy problem...

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x=y*cos48+a*cos30

x=(y+a)*cos48*cos30

x=y*cos48*cos30+x*cos48*cos30

 

This doesn't work.

 

And is this how automatic text color is supposed to work? Because my text now has a white background.

Yeah well I suck at math past highschool.

 

No it's not how it's supposed to look.

Location: Kaunas, Lithuania, Europe, Earth, Solar System, Local Interstellar Cloud, Local Bubble, Gould Belt, Orion Arm, Milky Way, Milky Way subgroup, Local Group, Virgo Supercluster, Laniakea, Pisces–Cetus Supercluster Complex, Observable universe, Universe.

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Yes the triangles do meet at the center of X , how did you came up with 15.099?

a + y = 20

cos(30) *  a + cos(48) * y = x

cos(30) * a = x/2

 

solve all the 3 equations (my calculator does that for me ;) )

Mineral oil and 40 kg aluminium heat sinks are a perfect combination: 73 cores and a Titan X, Twenty Thousand Leagues Under the Oil

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a + y = 20

cos(30) *  a + cos(48) * y = x

cos(30) * a = x/2

 

solve all the 3 equations (my calculator does that for me ;) )

I was just going to ask Nyxathid if the triangles meet at the center as I couldn't come up with a third equation otherwise, but you beat me to it :lol:

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I was just going to ask Nyxathid if the triangles meet at the center as I couldn't come up with a third equation otherwise, but you beat me to it :lol:

Yes both triangles do meet at the center :P 

 

if you could be more thorough that'd be nice

Erm.. that is the max that i can do because i dont have the problem in front of me , this is a problem that the teacher asked if we could solve it 

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How did you came up with those results ? Again sorry .. but I really have issues with trig.

You don't actually have to find them. You can use simulatenous equations to turn three equations into one with only one variable.

 

 

a + y = 20

a*cos30 + y*cos48 = x

a*cos30 = x/2

 

 

a = 20 - y

 

 

(20-y)*cos30 = x/2

 

20*cos30 - y*cos30 = x/2

 

-y*cos30 = (x/2) - (20*cos30)

 

y = ((x/2) - (20*cos30))/(-cos30)

 

 

(20 - (((x/2) - (20*cos30))/(-cos30)))*cos30 + (((x/2) - (20*cos30))/(-cos30))*cos48 = x

 

Now you only have one variable and I've probably made it way more complicated than necessary and it might also have some errors, but in my defence it's past midnight here.   :P

 

Edit: According to my calculator, this is equal to 15.099... which is what Stefan1024 also got, so it might actually be correct  :lol:

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Ok, and now using vectors, sorry I'm not explaining this, but I'm from spain so trying to explain this in english could make me sick xD Sorry! Just I put (0,0) In the center, and get every other vector, from coordinates, here I use (I dont know the name in english):

http://www.vitutor.org/geo/vec/images/43.gif

 

Also the result for the X is the same as indicated ;)

http://imgur.com/PeaYVLs

 

Hope it works for you!

 

PD: I used 20, but is 20M so X depends also from M ==> X = 15,099M

I'm from Spain so English is not my main language but I'm trying to make my best not writing any typo.

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