autism/pet peeve thread

"Half-powered x"

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saying "foil" past middle school

>>8958955
In what meaning? I call shiny Magic cards foil (adjective) and I call thin sheets of material a foil (noun).

>>8958933
"scroot x"

>>8958933
>root x (like foot)
My precalc teacher always said it like that and it really got on my nerves, excellent teacher though

>>8958961
>In what meaning?
He means "first, outside, inside, last", the standard method of multiplying two binomials.

"sin x" instead of "sine x"

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>>8958955
>have to multiple two trinomials
>"just FOIL it"

>>8958974
The fuck.

>>8958974
You can't stop me from saying "cosh x" and "sinch x"

"sine x" instead of "inverse arc sine x"

>>8958974
Do you mean how it's written out, or have you actually seen people pronounce it as "sin"?

>>8959004
Kek

>pi
>"pie"
Learn Greek, you uncultured swines.

>>8959031
only rages about pi, not the mutilation of mi, ni and almost every greek letter

Things that set my autism off:

>"What is 3-7?" "Um, -10?"
>pronuncing sine as "sin"
>pronouncing cosine as co-"sin"
>adults adding with their fingers
>kids who are given a new problem to do and they say "i dont know" within the first 5 seconds and stop there

>>8958933
squarootex

>>8958972
Oh, you mean foiling?

>>8959198
That's such a stupid mnemonic, why not just call it distribution and call it day? People don't even remember what distribution is anymore

>>8959202
it's essentially a checklist. while you're obviously right about distribution, if someone said that to me instead of foiling I would think of something more like 7(x+y) than (2x+7)(4x+9).

>>8959202
>>8959326
Reminder that mnemonics are for brainlets

>>8958933
[eqn]\sqrt{\mathbf (\star}[/eqn]

>>8958933
Igenvalue
Iv had to read that at least twice

Burgers calling indices, 'exponents'

>>8959393
The root of all evil

>>8959399
My linear algebra prof would call it an "eye-in-value"

I swear he did it just to piss everyone off.

>Yoo-ler
>Dij-kuh-struh

>>8959185
8/10

>>8959544
My native language is German but whenever I speak of him in English I call him Yooler. I can't stop.

>"global warming is a fact"

>>8959573
Sometimes I wonder how I can possibly justify interpreting the arrangement of pixels on my monitor as something someone has written

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>>8959393

>>8959023
People say sin, unfortunately.

>>8959192
>cosin
i fucking lost it

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>>8960287
I've had people just read it straight as in "cose". I honestly would rather hear co-sin than this.

>>8960442
Why are people retarded?

>>8959192
>calling sinus "sine"
>calling cosinus "cosine"
Anglos should be mass euthanized.

Using parentheses for open intervals

>[math] \log f(x)=\log g(x)\\~~~~~ f(x)=g(x)\qquad (\div \log) [/math]

>>8958965
Lol was he from the midwest US? that's how my friend's dad from wisconsin talked

>>8959399
Chinese TA said "Igor-walyews" and "Igor-wecters"

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>derive with respect to x

>>8960551

Brackets for coordinates, intervals, and vectors all overlap to the point of ambiguity already.

Though I do wish ]x1,x2[ were standard.

>>8960735
in spanish, that phrase is correct
what's the problem with 'derive' in english?

>>8960448
Not retarded, they just don't know what that refers to. Haven't been taught

>>8959192
I knew someone in high school that would say "coze" for cosine. I'm also a senior year math major and sometimes add with my fingers kek.

>>8960939
No, in spanish that is not correct, mathematics is universal. The correct term is "differentiate" stupid beaner
captcha: hotel mexico

[math] 1x [/math]

>>8961014
[math] 1\cdot x [/math]

>>8961024
[math]1\times x[/math]

>>8958974
In Greek schools you write "sin" as as "ημ" (spelled im) and "cos" as "συν" (spelled sin).

Then, when you go to higher education, you use the international notation "sin" and "cos" and it's infuriating at the beginning to write "sin" and mean sine instead of cosine.

>>8961001
I got fabrica billiares


>>8961014
>>8961024
>>8961028
or 3 x x where the middle x denotes multiplication but you can't tell the difference.

>>8961028
1^x (and no, it's not an exponent)

>>8958955
what do you call it? "expanding"?

>saying [math] {\sin}^{-1} [/math] as anything other than "arcsine"

>>8961063
[math]
\begin{vmatrix}
1 & 0 \\ 0 & x
\end{vmatrix}
[/math]

>>8961063
w-what is it?

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>"d-y-d-x"

>>8961135
>d of y over d of x
I never understood why kids in my class would say "d of x" as if it's a function.

>>8961066
distribution nerd

>>8958955

fucking kek

>>8960939
Derive means to obtain or recover.

>>8961108
cose 0

How to pronounce dy/dx?

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>>8961227
"y prime"

>>8961227
"The derivative of the function y with respect to the variable x"

Or for less autism

"The derivative of y with respect to x"

>>8961227
"dee-why dee-ecks"

>>8961211
I see
I'm pretty sure even translated textbooks use the term "derive", though

>>8958955
>caring what other people call things
what a brainlet activity

>>8961272
>coming into a thread about autistically insulting what other people call things
>only reply with this post to the guy who insulted the thing you obviously say
How dishonest.

>>8961272
Did you even read the subject you jabroni?

>>8961280
:^)
>>8961282
nope (obviously yes)

>>8961284
>merely
>pretending

>>8961239
oh god all of those people in the background laughing

I'm getting 2nd hand pain just from looking at this

>>8961149
>Bait
Take DiffEQ and you will understand why it is.

>>8961247
patrician right here

>God is real

>>8958998
"shine x"

>>8961745
>God isn't real.

>>8960551
it's usually obvious in context
though I do agree it should be less ambiguous

>>8961745
>>8961769
>I'm agnostic

>>8959393
>>8959419

O_O

>>8961227
d by y by d by x

ell enn ecks

>>8961239
>>8961298
Don't be stupid, that's way too over the top to be serious. I had a good laugh honestly.

>>8961959
Most on /sci/ (and 4chan im general, really) don't have the concept of humor. Every single thing is either out to get them, annoy them or insult them.

>>8961992
>no oxford comma
leave this land

>>8960453
Ikr, that's just fucking idiotic

>>8962050
This. Thank you

>>8961227
d over d x of y of x

>>8962050
>>8962073
>complaining about someone's punctuation
>without using punctuation
?????

Is it normal to pronounce tanh as "tanph"?

Makes me want to vomit every time my lecturer says it

>>8962152
I say "tanch"

>>8961227
y dash

>>8962152
In my mind I always read it as "tan-h" as if you're saying tan-hello but cut off the "ello". I'm glad I never had to say it out loud because I know it'd be fucking stupid. I do the same for sinh but at least cosh can be easily pronounced.

Patrician tier:
Sinus, cosinus, tangens, cotangens, arcsinus etc.
Pleb tier:
Anything else

>>8962140
:^)

>AutoCAD

>>8958933
Are you saying it should be "rad x" or do you prefer "square root of x"?

>>8962290
square root would suffice better because that is what it is.

>>8958965
>root x
Shit, is that wrong? I've been saying it like that for a while.

>>8962379
he means pronouncing it funny i believe, look pronouncing the oot part of root like the oot in foot

so itd sound more like rutt than rewt

>>8959393
underrated post

>>8962403
English phonetics, everyone. German should've stayed as scientific lingua franca.

>>8962594
>German should've stayed as scientific lingua franca
never thought of this but it actually makes sense

>>8962152
>>8962154
>>8962178
I say hyperbolic tangent like a non-retard

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>>8959185
>mi
>ni

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>>8959192
>2017
>Not pronouncing cosine like Sean Connery would.

Bro, do you even science?

>pronouncing sinh as shine and tanh as than

>>8962290
"rad x" or "radical x" don't mean anything. they're incorrect when referring to the square root of x.

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>>8958933
What? "Radical Six"? Never heard of it.

>>8962152
tan-aych

>>8962819
It's [spoilersonsci]rad as fuck[spoilersonsci]

>>8962634
It is mi, ni. Pronounced mee, nee.

>>8962997
>not saying tanch
stay pleb

>oilers identity

>>8960589
I am from Minnesota and say 'root' like 'foot' and everyone at my university calls me out on it.

I also will never forget the look on my classmates faces when I said 'ordinate' for the y-axis.

Then I said the proper term for the x-axis and their heads exploded.

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>>8965093
>"ordinate and abscissa"

>>8961778
>lol I mean I don't think god is like, an old man with a beard, or anything...

>>8961247

This is the only correct answer

>>8965249
what? I thought the extra bar went on the left, or is this something else and I'm just retarded?

>>8958955
>>8958972
>>8958993
>>8959198
>>8959326
>>8961066
FOIL is a retarded rote technique to avoid teaching distribution. It is for literal retards.

For those who still don't understand how it is just distribution, allow me to dumb it down for you:
>(a+b)(c+d)
>(a+b)c + (a+b)d
>ac + bc + ad + bd
alternatively, since multiplication is commutative
>(a+b)(c+d)
>a(c+d) + b(c+d)
>ac + ad + bc + bd


Congratulations, now you understand how to multiply complicated expressions and polynomials of arbitrary but finite degree.

>>8958933
pi is exactly 3

>>8958955
>foilage

chegm8t

>>8965249
That's just fucking cruel.

People who say "we" when referring to physicists trying to prove things.

>>8965352
surely its easier using foil than how youve done it though

>>8965192
I think I've literally only seen those words once before, on a midterm done up by a greek professor actually

>>8966953
No, foil is just distribution twice. It's easier to understand distribution because you often have to apply the technique in reverse in order to factor things.

Moreover, distribution may be applied to polynomials of arbitrary size and if you understand the technique then you don't have to really write the intermediary steps.

(a + b + c)(d + e + f)
=a(d + e + f) + b(d + e + f) + c(d + e + f)
=ad + ae + af + bd + be + bf + cd + ce + cf

Someone who is using FOIL doesn't necessarily understand what they're doing or why that result holds. They basically have to relearn math from scratch once they reach abstract algebra.

>>8961227
The slope of the tangent

>>8958933

Using 'an' with nouns that do not start with vowels.

> an firecracker
> an factor
> an memory region
> an bottle cap
> an differential

etc...

>>8967258
What the fuck? Who or what even does this?
I mean, my mother language isn't English and I stll wouldn't do this, what the fuck.

>>8967258
Sometimes British people do this with words that sound like they start with vowels in their pronunciation. Like they would say "an hero" instead of "a hero", the same way we say "an hour."

>>8961932
d by y by d by- that's all folks!

>>8967340
>an hero

>>8958933
>[math] sin^{-1}(x) [/math]
>not [math] arcsin(x) [/math]
Well is it 1/sin or is it the inverse sine function MAKE UP YOUR FUCKING MIND

>>8958933
You know what sets off my autism? People who can't figure out that the answer to their questions can be found by looking at the graph.

>>8968002
[math]\sin^{-1}(x)[/math] is fine. for variables [math]{}^{-1}[/math] means the inverse wrt * and for functions it's the inverse wrt [math]\circ[/math]

>LaTeX
>Làteks

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>>8961756

>>8968371
Kek'd

>>8968229
In the case of sin, the (-1) means arcsin,
sin^(-1)(x) != sin(x)^(-1)

>>8968390
yeah i know. my post doesnt contradict that, does it? not sure if were talking about the same thing or if i didnt explain myself well.
anyway [math]\sin^{-1}[/math] is the inverse of a function and [math]\sin(x)^{-1}[/math] is the inverse of a real number

>>8968466
sin^(-2)(x) = sin(x)
It's the inverse-inverse sin

>>8968533
REEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

>>8961227
"Didcks"

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>>8959393
>>8959419

>>8968229
>>8968390
>>8968466
>>8968533
Okay then shit like
>[math]sin^{2}(x) + cos^{2}(x) = 1 [/math]
needs to stop being written the same way.

The inverse sign is arcsin. 1/sin is csc. There is no reason to ever write [math]sin^-1[/math].

>>8968815
shit. i forgot about that. i guess to make everything consistent it should be written [math]\sin(x)^2+\cos(x)^2=1[/math], although im not yet autistic enough to do that irl

>>8966976
>>8965192
So using the correct term for this plot axis is wrong in some way?

You should be in my class when I see an infinity symbol. I bet you fags say 'infinity hurr durr hurrr'.

Get on my level. It is a lemniscate.

>>8968868
Woah my dude I bet you slay all the girls when you use words like that.

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>>8961227
the second derivitive of the indefinite integral

>>8961227
>dy/dx
You mean dy/(dx).

>>8968840
But this can be understood as squaring the argument, to avoid ambiguity it should be [math](\sin(x))^2[/math]

>>8969670
>But this can be understood as squaring the argument
No, it can't, [math]\sin(x^2)[/math] or [math]\sin((x)^2)[/math]

>>8969670
You don't even need that because [math]\sin[/math] has a lower precedence than [math]^2[/math].
In other words, when you write [math]\sin(x^2)[/math] the brackets are redundant, you could just as well have written [math]\sin x^2[/math].

To convince yourself of this, expand [math]\sin(\xi)[/math] to [math] \frac{e^{i\xi} - e^{-i\xi} }{2i}[/math] and once you substitute [math]\xi[/math] for [math]x^2[/math] you can use the rules for exponentiation to conclude that [math]e^{i x^2} = e^{i(x^2)}[/math], so the squaring operator binds more tightly than the sine.

>>8958955
What else should I call it then? The airflow circumventing the specific shape of the wings?

My year 9 maths teacher would pronounce [math]ln(x)[/math] as "in x"

>>8961227
Rate of genderfluidity

>>8958961
It is being used in the adjective sense.

It's a little known fact that foil makes you better at the game. Same goes for math. Foil paper makes you better.

Git gud.

>>8961227
dy-dix

>equation starts with a negative sign
>sin(x), no parenthesis

>>8962920
i get it

>>8961123
outer product maybe?

>>8962152
our high school teacher said "than"

>>8968815
I actually thought that was iteration notation in highschool and it confused me for a while. Thought that the exponent should go over the right parenthesis and still do.
Also,
>[math]sin \text{ instead of } \sin[/math]