Well its day 0 now since you technically used them in this meme even if it was only the words
So you’re saying the real reason we learn about trigonometry is so we can talk about how pointless and shit it was to learn
So when I type the word “sink” I’ve used the sin() function?
Yeah you are. You can’t use electricity without it.
TIL I’m an HTML developer because I’m surfing on the internet
The meme said they didn’t use it not that they didn’t apply it.
You use HTML but don’t develop in html when surfing web
Nah, I hired an electrician to handle all that for me. Now if I want electricity all I have to do is stick a plug in a socket, or flip a switch. It’s way more convenient.
If the power into your house is off from 60Hz (or 50 depending on your region), an electrician isn’t going to do diddly.
How could it be off frequecy at house level? Aren’t the generators at the powerplants being spun at 50 or 60 times a second?
Not exactly. There’s a ratio of RPMs of the drive motor to the specific input of the alternator that generates the correct frequency. It depends on the way the alternator is designed (ie number of poles) that will yield the correct frequency, almost like a gear ratio, that is optimized for efficiency, and power plants have to constantly make slight adjustments to the drive motor speed the keep the frequency exact (usually done automatically within the drive control system).
I’ve never seen frequency be an issue in a residential system, but in theory it could happen.
It used to be common for clocks to be driven directly off the electrical frequency. The US Navel Observatory would call up generator plants and tell them to slow down or speed up a little to make a correction to all the clocks. I’m not sure if that still happens, though.
I don’t know how it’s in 60Hz regions, but here the generators are in 3 phases, 120 degrees apart. The voltage gets transformed to up to 400kV, still in 3 phases, and then down to 400V when it’s distributed to peoples’ homes. Then you can pull 400V 3-phase or 230V 1-phase from your wall.
It’s the same here, though we have varying degrees of transmission and distribution voltages via transformers and regulators. In my area, power comes into our valley from the 500kv lines through the open desert, into the valley at 33kv, and stepped down to 5kv for neighborhood distribution that the single phase 240/120v transformers tap off for the EOL.
More of what I was getting at was that generation is more or less the same across regions. Some external fuel source (whether it’s diesel, natural gas, nuclear, steam, etc) does its thing to drive a rotor that’s connected into an alternator which is essentially an electric motor but instead of the electric motor doing the driving, it’s being driven which generates power, and the RPMs of whatever given fueled drive mechanism are not necessarily 1:1 with the alternator speed.
My understanding is that if electrical demand starts outstripping supply the sinewave can start getting badly mishapen.
From watching videos about synthesizers and playing with VCV Rack I’ve learned far more about waveforms than I ever did from any electrical education or research
I sin everyday.
cos i have to
tan I go to bed
deleted by creator
Basic trigonometry is super useful and not that hard to understand or memorize.
It’s because trigonometry is used to teach people geometry and nothing in real life application. You want basic trigonometry in real life we should use physics as a basis for why trigonometry is useful in real life. You can’t expect theory to be used in practicality when nobody has any experience.
I don’t understand, out of all of the things that we teach students in schools, out of all of the things that people don’t demand justification for learning, why Maths gets all of the flak. It’s the foundation on which the universe exists. If people don’t understand that they’re not just learning trigonometry “just cuz” then they probably don’t have much of a career in STEM planned for themselves. Which is fine, but western society’s blindspot for STEM is 100% attributed to the intentional undermining and dumbing-down of the education system.
We regularly don’t give students justification for why they learn grammar, biology, chemistry, physics, visual art, and music. But as soon as you show someone a standard polynomial, they lose their fucking minds.
I dunno, I see people complain about “why do we have to read books that are hundreds of years old?” too pretty frequently. Some people are just hostile to education. Honestly, cost aside, I’m a little disappointed in the number of people who complain about college as if the only thing you get out of college is a piece of paper.
It’s a valid complaint. Why is Shakespeare more legitimate than, say, Stephen King for high school classes? Reading is reading, and asking students to read boring books because “they are classics” is the best way to discourage them.
In high school, I had to read Phèdre, a story told in verses about some incestuous rednecks from Greek mythology or whatever, written in the 1600’s. It was painful.
I think there’s something to be said about shared cultural experiences, and so reading some older books is probably a good thing.
To clarify what I mean though: that means that we should be reading stuff that was written/popular when our grandparents were our age. Going back 200+ years should be saved for a history class cause that’s the real value in reading that material. In my opinion, Great Gatsby should be about the oldest book kids need to be reading for a literature class these days, and even that’s pushing it.
There are a lot more authors who took inspiration from shakespeare than Steven King. Shakespeare is just objectively more influential, tropes he invented are used all the time in many places and there is value to understanding where the source comes from.
For that matter, why do we read Shakespeare? They’re plays. Watch them as plays or movies. If kids first exposure to Star Wars was by reading the script, they’d hate that, too, and they should.
I had to read Shakespeare, then read another book about how witty and clever it was to the people of the time, then write a report about how witty and clever it was, once I understood the historical context. My conclusion that having to explain jokes is the death of humor got me a C-.
It’s the exposure that undermines it. Their isn’t enough exposure to real life application and examples. How many people never realise that velocity is a derivative of position over time or acceleration is a derivative of velocity over time. Or that the speed of light is a horizontal asymptote for matter.
Ah yes, because plumbers, electricians, and brick layers never have to deal with geometry. That being said, none of my geometry education was taught with a practical motivation. But that being said, I was in the advanced track classes, so none of us were becoming professional carpenters. I’m actually probably one of the most “hands-on” people from that class, both in my job and in my life. I build scientific instruments and enjoy fixing things around the house.
Trig is honestly the math I’ve used the most since finishing school. But to be fair, that is mostly because it’s useful as hell when doing game development as a hobby.
The only function is sine, the rest are just remixes and ratios
Or cos if your weird
Or some say Kosm.
man I was talking about bloodborne today at work and I miss that game, might be time for a replay. Sucks that its 30fps tho
Yeah and I’ll bet you use Tau instead of Pi, don’t you, you human scum.
Sin(x+π/2)
cos(x-π/2)
It’s true.
Cos(x) is just the derivative of sin(x)
You may have used them indirectly in the compression of your image
Fair enough, but did they use it? I always felt like focusing on statistics instead of random trig stuff for non stem people people would be more useful
if you were a more interesting person you could make up a use for them
Alternatively, you could be this guy.
I aspire to be this man when I am that old.
Woah. I was really expecting the “will we ever use this in life”/“you won’t but some of the smarter kids might” strip, which is also SMBC.
I like math :) Its mysterious and fascinating and constantly surprising, like seeing the source code of the universe. Closest shit we have to actual magic.
Do I like math? Yes
Do I understand a tiny bit of it? Absolutely not
Me, whose going to start studying EE: 😭
HAHAHAHA GOOD LUCK! I’m in my final year of my EE study and I cannot wait to escape this mental asylum
Electrical Engineers are the psychos for using j instead of i. Absolutely bonkers.
Yeah, I agree. They messed up the scheme we had going. It was a good thing, and electrical engineers had to come and be all different, confusing everyone else along the way.
From my point of view the mathematicians are evil. I can’t stand them using i in my math classes, messing my whole scheme up. Respect for my physics prof in my first semester for switching to use the correct letter j
From my point of view the mathematicians are evil.
Well, then you are lost!
That’s a bit much dude, mathematicians gave us complex numbers. You can’t hate too much on the ones who invented our jobs 🤣
imagine using i instead of e1^e2
There is hope for you after the asylum. My daughter has an EE degree. While in school, she would call me every October and tell me how terrible it was and that she wanted to drop out. I would talk her off the ledge, and she got through.
Now she’s working, making more money than I do in her early twenties, and she loves loves loves her job.
Keep going!
Luckily I have 6 years of Electronics manufacturing experience, so the math and theory are the things I’ll need to learn most of. Unfortunately, those things are the hardest part…
Don’t worry.
Trig is not hard ☺️
Compared to what you’re also gonna learn 🤣
Signed, An EE graduate from 2016, who now works in embedded fixed point signal processing 😵
One day, while working on a website, I was wondering how to calculate a specific point in a graph. After googling, the answer was by using sine and cosine. Mind blew away, I had always thought I’d never use them.
And guess what? You found it out without having to memorize the process until you knew it by heart.
Apparently, they didn’t know it by heart. If they had, they wouldn’t have had to spend all that time searching.
The point being that memorizing complex math is pointless unless you’re using it for some sort of day to day.
Not really. The point of getting really good at it in your teenage years is so that when it shows up 30 years later you have a vauge idea of what you’re looking at and can figure it out again. If you had only a surface level understanding to begin with, it’ll all be totally gone by the time you need it again, and very few people have the gumption to teach themselves a subject from scratch.
I use it all the time. I’m an engineer though so it doesn’t really counteract what you’re saying.
Contradict.
Counteract is also valid.
This is a counteraction.
Counteract means to oppose something to reduce its effect. Contradict means to say or do something opposite or inconsistent with something else.
Note how they are not mutually exclusive
Perfect, I can now use any word thats not mutually exclusive completely dependently (interchangeably) and be appreciated (understood)
No, you definitely still have to match the meaning to the context. That’s pretty fundamental to communication.
This attempted contradiction doesn’t seem to counteract the above comment.
Me working on graphics and audio programming all day.
[TRIGONOMETRY WARNING]
