/sci/ - Science & Math

c:d is in the same ratio of f:b

if you know c, b and d, then simply use the ratios to get f.

f/b = c/d

solve for f

subliminal facebook advertising detected.

the letters spell out

facebd (facebood)

with f highlighted to signify the begining!

>>3542887
Other breaking news:http://www.history.com/this-day-in-history/eisenhower-gives-famous-domino-theory-speech

>>3542875
>>3542879
you can imagine making b longer in this pic without changing f,c, or d. So no.

What I find strange about this problem is that e_x=d, i.e. there is unneccecaryy information.

however:
use e to find the lowest angle. use it for compute the point above d-c, which is the x-distance of the b-line. the you have to upport points of b and a and you can compute f by making a line through them.

>>3542915

what??? no you cant.

b is directly porportional to c,

if you change b, you change c in the same proportion!!!!!!!!

this isnt hard!!

>>3542922
I hope you were'nt just trolling, i.e wasting my time

heres some values that might assist:

a = 3
b = 2
c = 25
d = 35
e = 3 deg.

Honestly, I'd use a fuckton of angle theorems. Give me 5 minutes and I'll post something.

>>3542953
f = 1.333

>>3542932

what on earth are you trying to prove with that???

this is a simple magnification scenario, you can only increase b by sliding along the c or d line to keep the shape consistent wtf

f/b = c/d

f/2 = 25/35

f = 50/35

f = 1.43

>>3542972
he just proved that you can increase b as much as you like that f, c and d wouldn`t.

This isn`t how it works....

>>3542972
op is changing the sahpe because he's fucktarded

>>3542932

ffs

>>3542975

That isnt me.

The only inputs that can be changed are b, a, c, d and e. f is just purely a calculation.

There will be situations were f = 0 due to b being a small value or a being a high value.

>>3542972
you explained yourself wrong, but maybe you should actually prove what you're saying here

>e = 3 deg.
first of all it would have been informative that e is supposed to be an angle from the start. also, shouldn't the angle be something between 90° and 180°?

>>3542986

oops sorry, messed up the blue and purple ratios,

but you get what i mean,

if you increase the length of b, c will decrease in a proportional amount!

>>3542986
>mfw I thought that every would stay in place, hence c wouldn`t increase

But e is fixed so,,,

>>3543001

so the answer is 1.43? am i right?

im seriously. wtf. seriously

>>3542932
The point here still stands. How can you justify that f/b=c/d in this ONE SCENARIO? If it doesn't work in a scenario with a different a, why would it work for this?

Seriously, prove it.

>>3542915
I think, using what I said in my first post, the answer is

f = a + (b-a)*(d/c)

so

f = 3 + (2-3)*(35/25) = 3 - 7/5 = 1.6

>>3543013

wtf are you seriously?

its a goddamn magnification!!!!!

you can trace the diagonal lines it all the way backward and it will meet at a certain point!!!!!!!

OP here:

Cheers so far guys.

a = 5
b = 3
c = 30
d = 60
e = 95 deg.

using:

f = (c/d)*b

the answer is: 1.6

Correct?

>>3543040

i reeeeally want to know! because that other anon keeps telling me that its wrong!!!

>>3543040
fyi: f = (d/c)*b

>>3543040
>>3543047
"OP" with new data, random result...

Is this you're idea of a fun troll thread.
protip: It's not funny at all

>>3543025
Okay, well, I made a new magnification.
As you see, you can trace the diagonal lines all the way backward and they will meet at a certain point.

Then, as proven, in this case f/b=c/d

seriously, go fuck yourself

>>3543051

f = (c/d)*b

yeaaagh i know you now, troll!!!

get thee behind me!

>>3543058
>yfw a isn`t involved in your equation.

>>3543058

oh fuck off you troll

>>3543075
>>3543071
>prove retard wrong
>get called troll
I have drawn you guys another magical magnification

As before, you can trace the diagonal lines all the way backward and they will meet at a certain point.
Clearly, f/b=c/d still, despite c, d and f not changing.

>>3543059

Protip: everyone in this thread is anon...

This is a legit thread.

Cheers to all the decent replies.

>>3543098
I like where this guy is going.
He trolls and he is not afraid of anything.

>>3543196
Those are some pretty nice drawings without any discussion you have there, I'm sure you think they mean something

>>3543208
Just showing to you why you are wrong.

You can't have a equation with 4 variables here one of them can change without affect the others.

f/b = c/d is wrong.

you can increase the angle at f without affecting both sides of the equation.

>>3543214
are you really that far gone that you can't tell that I was arguing that f/b<span class="math">\neq[/spoiler]c/d?

>>3543196

i know that guy is a troll, but man, your own diagrams are pretty shitty eh

youre a mess, really, i know the gist of what youre trying to get at, but get your shit together.

not a troll.

>>3543225

so why is f/b not equal to c/d?

>>3543226
OCD fag.

get over it, i don't have a wacon tablet just to draw shit for yor highness, fuck you.

And I loved the not a troll. It's like a badge or something ?

>>3543231
you motherfucker

>>3542961
this guy got it right, everybody can go home now.
Thread's closed.

>>3543232

Wow shit. its not just the shitty construction of your diagrams

but WHAT youre attempting to illustrate

the elements in your diagram are pretty much meaningless eh shit for brains

it does not conclusively prove anything

why the fuck is x relevant?

so what if you have f prime?

the elements in focus should have been b and c and d.

for fucks sake, you must be socially retarded and have never explained a simple (fucking simple) mathematical concept in your life

if you write that shit in an exam id have given you a fucking big question mark with a see me later eh shithead

(f = d(b-a)/c + a)

>>3543248

Neeeerd raaaageeee. (but he does have a point)

>>3543248
>yfw I answer right half hour ago and you are still fagging

it's 4/3, get over it.

>>3543260

why

>>3543250
>(f = d(b-a)/c + a)
You are wrong
See above images, a increases faster than b.

>>3543292

That formula = 1.2 for the following:

a = 3
b = 2
c = 25
d = 45
e = 95 deg.

This is the correct value..... see attached.