/sci/ - Science & Math

[Anonymous No.11126017]

>Be me
>in Calc class
>class example problem includes derivative of tan^-1 x
>teacher stops and says it's not 1/tanx and whoever answered that on the previous test should just drop the class and that they have no business being there if they still think like that
>girl starts crying
Is your math teacher so based that they make brainlets cry /sci/?

[Anonymous No.11126023]

>>11126017
Seems more like a bad teacher but depends on the goal of the class / level.

[Anonymous No.11126028]

>>11126017
was he saying that tan^-1 =/= 1/tan? or that the derivative of tan^-1 =/= 1/tan?

[Anonymous No.11126040]

>>11126017

The inverse function notation is overloaded with the multiplicative inverse notation, which is a bit retarded. Regardless, only smoothbrains struggle with standard notation to the point of it interfering with their ability to solve problems.

[Anonymous No.11126050]

>>11126017
We had a professor like that and he particularly enjoyed torturing girls in our class indirectly. He got kicked out few years afterwards because it turned out that he was stalking girls after class and fucked one lmao.

[Anonymous No.11126114]

>>11126017
Well the notation is dumb. Any self-respecting math teacher would indicate wether they mean tan^-1(x) or arctan(x)

[Anonymous No.11126124]

>>11126114
holy shit am i stupid? i really thought they were the same. im in calc 3 and dif eq rn and i legitimately did not know they were different

[Anonymous No.11126153]

>>11126124
It's a notation that can either interpreted as inverse tangent (arctan) or the literal notation 1/tan(x). As tan^2(x) equals tan(x)^2, tan^-1(x) should equal tan(x)^-1=1/tan(x)

[Anonymous No.11126170]

>>11126153
Ya its just a dick move to not be explicit. Arc notation exists for a reason

[Anonymous No.11126251]

>>11126017
>prof says highest grad on the last exam was 97
>It was me
>my table mates who got 68, 89, 75 look at me
>fuck
now they won't stop asking for my fucking help. Never reveal your power level bros.
your teacher sounds based as fuck I had a prof like him before. My prof would show the highest and the lowest grade and the average including grades above 70 and the average of all the grades. He would point to the grades with 50s and say, "this isn't looking well for whoever these are"
fucking awesome.
>>11126040
bro it is so simple when the inverse notation is over a function rather than a variable it is saying it's inverse. When the same thing is used on a variable it's saying it has the power of -1
how could smooth brains fuck that up?
if they were asking for 1/tanx they would obviously put the -1 on the outside and probably use parentheses (tan(x))^(-1).
this just shows that they don't do their homework otherwise that would be trivially understood back in trig
>>11126114
arctan(x) is based.
>>11126170
arc notation is based as fuck. I always write it.

[Anonymous No.11126260]

>>11126017
Truly, the first step to mathematical enlightenment is the ability to transcend the different notation people use.

[Anonymous No.11126279]

>>11126017
I asked the prof why he dicked me in the ass over demonstrating my U substitution (I would have gotten 100% otherwise), but then he complimented me on getting to highest grade in the class.
bros, this is a calc related question.
There is this really cute girl in my calc 2 class (same class I was just talking about), she is tall, skinny, and has brown hair. I really what to talk to her but she sits on the other side of the room.
The reason I do really good is because I already know calculus, but I think she is really smart because she is the only person that finishes right after me, except I usually spend time reviewing what I've done and tend to be almost the last person to turn my work in.
I'll sometimes stare at her in class, and she's never noticed. I don't want to give off any rapey vibes, I'm the biggest dude in my class because I used to play foot ball in high school. I'm 6 foot and probably over 200 pounds of beef.
I'm a virgin too. My dick is 8 inches but it's super fucking curved. I don't have a lot of confidence with girls.
what do bros?

[Anonymous No.11126289]

>>11126050
hot

[Anonymous No.11126291]

>>11126251
>if they were asking for 1/tanx they would obviously put the -1 on the outside and probably use parentheses (tan(x))^(-1).

sin^-1 x = arctan x
sin^2 x = (sin x) * (sin x)

It's retarded but you just have to learn it.

[Anonymous No.11126297]

>>11126291
it becomes second nature after doing it long enough.
That's why I say that bitch probably never did homework in trig.
Homework wasn't graded in my trig, but I still did it as practice.

[Anonymous No.11126321]

>>11126279
this is your brain on cummies
give up your academic career now, it’ll be easier

[Anonymous No.11126354]

>>11126321
No, honestly they just shouldn't allow women into Math classes.
I am ok with being a virgin, I practice asceticism. But she seems really smart and I need to gauge whether she will be a good wife to bear my child, who'll be a math god.
My academics are fine, I jerk off once a week for health, and do plenty of autodidactic study. I don't understand your advice to give up my academic career? elaborate, will you?

[Anonymous No.11126363]

>>11126279
you're a pathetic sack of shit kill yourself

[El Arcón No.11126375]

>>11126017
I think it happened a year before I met him and I only heard about, but one of my professors Predrag handed back a upper division physics test with a McDonald's application stapled to each one and he told them that that would be a better career path for them. Pretty based. If I ever did something like that, then I would get fired, sued for harassment, and found guilty of aggravated sodomy on a child but Predrag got away with it.

[Anonymous No.11126380]

>>11126017
Being confused by ambiguous notation is not the fault of the student. It might seem "obvious" given the context, but only after practicing this stuff for a while you come to realize that ever referring to \tan^{-1} as the reciprocal of tan is confusing. The whole point of taking a class, especially one as elementary as calc, is that these students have likely never encountered such ambiguity (that mattered) before.

Point is, teacher is a dick, and a statement like that is one step away from all the fucking memes that use "÷". The student was wrong and they need to learn from it, yes, but such a snide comment for an honestly understandable mistake is uncalled for.

Also, what quadrants is this nigger using? If you don't specify atan2 notation you may come up with the wrong sign. So fuck him, I know that has nothing to do with the rote memorization that is calc 1, but that just further highlights the ambiguity of the notation.

[Anonymous No.11126390]

>>11126375
>Predrag
Georgia Tech or George Mason University?

[Anonymous No.11126393]

>>11126354
you cant be a truly great man if youre held back by some thot, so go ahead and give one of those two things up

[Anonymous No.11126594]

>>11126028
He meant tan inverse wasn't the same as 1/tanx, and if you still believe that half way through the semester then you're guaranteed to fail.

[El Arcón No.11126652]

>>11126390
Georgia Tech. One time in Predrag's class, the topic of gefilte fish came up. Though I like it, I don't like how it looks. I made a comment, "It looks so gross!" Predrag said, "Woah, woah! Hey now. It's getting a little anti-Semitic in here."

Predrag also once told that me when he was much younger he was working on a very difficult problem which after some period of years he discovered the problem was exactly equal to the Riemann hypothesis. He said to the class, "So if you ever find that your research has brought you to a place where you're trying to prove RH, my advice to you is to change research directions." Glad I didn't take his advice!

Predrag is also the one who first explained to me how Feynman generalized the classical action to the quantum theory. He did it in about two minutes as an irrelevant aside during a lecture about something else. I've never see it explained anywhere as well as he did in those two minutes. Smart man! This is one of the reasons why I say there is no substitute for lectures from genuine subject matter experts: the stuff they tell you that isn't in the book is priceless.

http://chaosbook.org/

[Anonymous No.11126670]

>>11126354
1. say hi
2. before saying hi she has to know you
I have an idea anon, finish before her (one failure is ok) and act like a cool guy and not like a sperg....
>"oh come on you always beat me"
>silence or answer
>if silence "how"?
dont sperg and act like a fucking football player

[Anonymous No.11126740]

>>11126363
Why bro? I am no unhappy. I am just nervous about talking up this math cutie. I just got back from the gym and am planning on reading my functional analysis textbook. I am feeling good. But a wife would be nice.
Give me a good reason I should die and I'll consider it.
>>11126380
it's a calc class. knowing trig is a prereq to it.
OP's female class mate is definitely a pussy, but this would have been a good opportunity for OP to score by tutoring her.
>>11126393
Based. You're right bro. If she wants me she should beg for me. Not the other way around. I'm over it.
I like reading philosophy (reading jenseits von Gut und Böse right now), studying math, and pumping iron in my free time. I'll find a girl when I am an accomplished man.

[Anonymous No.11126791]

>>11126017
WHAT THE FUCK IS TAN^-1? DO YOU MEAN FUCKING ARCTAN? DO YOU MEAN COTANGENT? THE FUCK?

[Anonymous No.11126928]

>>11126279
Grab her body with your big meaty hands and fuck her in front of the class.

If anything, you can pretend to not know something and ask for her help, act like you normally would with your peers (unless you act autistic, then don't). Ask her for her number to "message her again if you don't know something", then try to transition into conversations.

[Anonymous No.11126934]

>>11126928
what the fuck is that thing?

[Anonymous No.11126938]

>>11126934
A woman

[Anonymous No.11127046]

>>11126017
tan^-1 is probably some of the worst notation I've seen in my life. That being said, literally every teacher I've had has pointed this out, so I have no sympathy for the girl.

[Anonymous No.11127063]

>>11126050
what I chad

[El Arcón No.11127601]

>>11127046
>tan^-1 is probably some of the worst notation I've seen in my life.
this notation is perfectly fine and totally unremarkable
[math] \tan^{-1}x \neq(\tan x)^{-1} [/math]

[Anonymous No.11128343]

>>11127601
sin^2 x = (sin x)^2 tho

[Anonymous No.11128431]

>>11128343
This is a valid point.

[Anonymous No.11128446]

>>11126050
The smartest person in our class is a girl.
No joke.

[El Arcón No.11128453]

>>11128343
>>11128431
yeah, that is a good point.

[Anonymous No.11128467]

>differential equations class
>prof is demonstrating how to get a special solution by variation of parameters
>literally writes that we choose c=0 while integrating because it's just a particular solution
>some guy tells him he forgot to add a +c while integrating seconds later
>prof got so angry he just turned off the mic and walked out

[Anonymous No.11128494]

>>11126017
I had a teacher like this in middle school Algebra 1

After the midterm exam he read everyone's exam scores in alphabetical order in front of the class and would call everyone who made a D or lower a dummy. A lot of girls started crying. I don't know what would possess him to be that mean to children.