Well its day 0 now since you technically used them in this meme even if it was only the words
Smartass!
So when I type the word “sink” I’ve used the sin() function?
Yeah you are. You can’t use electricity without it.
This is a DC only household
Shut up Thomas, Nikola won!
How do you run your appliances?
I don’t, I’m actually Amish. I’m writing to you from a steam powered thinking machine
TIL I’m an HTML developer because I’m surfing on the internet
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.
Neither am I cause I don’t know what that means.
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
Basic trigonometry is super useful and not that hard to understand or memorize.
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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.
For me, my “education” with math was "when you see this: 5/73¥π7^t then you use 5-8(25&6)_9gh8/6 not 5&6(9!4_89) ok memorize it for the test.
Oh you want to know why or what it does or what it even is? No that’s college work. You’re in highschool, memorize it because reasons.
Yeah… That’s not how my brain works no matter how badly I wish I did. I need to UNDERSTAND not memorize! I can’t memorize seemingly arbitrary bullshit that has no explained meaning. My brain instantly tosses it as irrelevant information.
Same but “you’re in middle school, that’s high school stuff”
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-.
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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.
I sin everyday.
cos i have to
tan I go to bed
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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
Sticking with image compression, see Quite Okay Images. It treats each pixel as three numbers and expects mostly small changes. Recent pixels get hashed and can be referenced in a few bits. This is enough to compete with PNG filesizes, an order of magnitude faster, while handling each pixel exactly once.
Agreed, I use highschool level stats knowledge on a nearly daily basis, whereas the last time I did any trig was to follow along with a math video I was watching on YouTube. Trig/calc were mandatory, stats was not.
And stats really should be a mainline math class in high school. It comes up in so many places, and is far too often simplified away into a binary black & white choice.
Any time something happens that was predicted to be less than 50% likely, people lose their shit. For instance, when it unexpectedly rains or the wrong person wins an election.
But it’s not even being able to run the numbers or understanding statistical significance. It’s much more basic, just understanding that probabilities and uncertainty exist and are everywhere. My favorite example is when going to the doctor. They explain that whatever you have is probably X or Y, with a small chance of Z, but Y has been going around a lot and is easy to treat, so let’s try medication A for it. Then when that gets reported to friends and family afterwards, it’s “she said I have Y and I need A to fix it.”
Plus, if someone needs calculus for their major, they’ll just make them take it again in college. Why build high school math around it?
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.
Or building some stairs or really a ton of shit. Basic trig is such a useful thing that it tells me people who complain about it have never built anything, virtual or physical.
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)
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
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.
if you were a more interesting person you could make up a use for them
Best take right here. Trig shows up a lot when you actually do stuff. Woodworking, programming, physics, art, music, philosophy. Math shit is universal human language.
Math shit is universal
humanlanguageMath shit is universal
humanlanguage. True.But the language part of it is pretty human.
The other fields I get (trig is insanely useful), but how the bloody hell does one use trig functions in philosophy? Are we gonna be triangulating the border of science to solve the demarcation problem?
Math is philosophy, and trig does a very good job of describing the world we experience. The unit circle, right angles, pythagorean theorem, sinusoidal damping, etc, are all pretty philosophical concepts. What else could the be.
I like doing stuff but my adhd literally won’t let me learn trig 🤣 my brain will just shut down and start daydreaming of literally anything else.
Don’t tell yourself that, unless you’re just not that interested. It takes more work and catering some creative solutions, but it is worth it. I got an engineering degree before I was ever even diagnosed or medicated.
I’m totally not interested in math stuff, like at all. If I need it for what I’m trying to do, or if it greatly helps me with it, I still end up learning it anyways though :) People often say that learning in practice is the best way and I feel like that is even much more true for me personally. I’m goal oriented af, and I make all those goals myself based on what I want to do. If I really really really want to do something, there’s nothing that will stand in my way, I’ll find a way. I’m the type of person to get frustrated and say “fuck this I give up”, only to be back at it after 30 mins because giving up isn’t actually something that exists in my head haha.
So no need to worry about me telling myself that. I guess I was thinking from the perspective of just studying it because of studying it, which yeah is basically impossible for me unless it’s just something I’m really interested in and I’m stuck browsing Wikipedia at 3AM. Thanks for the encouragement though, nice stranger! I really do appreciate it.
Honestly. If you’ve ever played a videogame, it will inevitably require trig.
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I’m might be splitting hairs, but I would argue by virtue of using a machine that uses trig, an individual is using trig, though abstractly. I’m sure you’re brother is dumb, yes.
Me, whose going to start studying EE: 😭
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 😵
HAHAHAHA GOOD LUCK! I’m in my final year of my EE study and I cannot wait to escape this mental asylum
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…
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!
[TRIGONOMETRY WARNING]
I see you have never built a chicken coop.
I must be missing something in this comment.
Can someone tell me how chicken coops are related to that ?
One common application of trig is figuring out lengths and angles of triangles. Planning on building anything usually involves triangles.
Building anything requires trigonometry, unless you just say “fuck it” and hope the thing doesn’t fall apart, which is a pretty stupid way to live life.
I’m not sure what you’re building but you might be over-engineering your wall shelving.
Alternatively, you could be this guy.
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.
Me working on graphics and audio programming all day.
