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!
From the first sentence:
[…] uses direct current (DC) for electric power transmission, in contrast with the more common alternating current (AC) transmission systems.
So, actually actually. ;)
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
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.
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
I sin everyday.
cos i have to
tan I go to bed
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Basic trigonometry is super useful and not that hard to understand or memorize.
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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.
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.
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?
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.
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.
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.
The only function is sine, the rest are just remixes and ratios
Or cos if your weird
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)
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.
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 😵
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.
This attempted contradiction doesn’t seem to counteract the above comment.
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.
Trigonometry is extremely useful when constructing things. Need to know the length of wood needed to go from corner to corner. That’s trig my friend.
Go on…
A^2 + B^2 = C^2 is known as the Pythagorean theorem. This theorem explains the proportionality of the 3 sides of a right triangle (a triangle with 1 corner angle = 90 degrees). If you know the length of 2 sides (in his example, the wall beams) you can find out the length of the third (in his example, this would be the supporting strut spanning the beams that meet at a 90 degree angle). If their example is explaining a beam that spans the room from 1 corner to the other, you still use this formula as a rectangle is 2 right triangles that meet along their hypotenuse (the longest leg of a right triangle, or the length you are solving for in this problem). The 2 known sides are the length/width of the room, and you solve for the 3rd side, your diagonal beam
Did Pythagoras even know about sin, cos and tan? I am reluctant to call A^2 +B^2 =C^2 trigonometry.
Hipparchus, the alleged founder of trigonometry, was alive 350 years after Pythagoras (500BC to 150BC).
Completely fair point, that I do not think I have the knowledge to speak on. On the Trigonometry Wikipedia page, he pops up a few times, and many trig identities are known as pythagorean identities. Perhaps its not fully trig, but was used as a basis to help discover trig? Without having the understanding pythagorus gave mathematicians regarding triangles, I would think it would be pretty hard to begin developing deeper math regarding said triangles
Squaring using 3+4=5 is one of the oldest relationships used by masons. don’t need a ruler, just a piece of string or straight edge. Pythagoras described the relationship on paper
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.
Chicken coops have a ramp for the entrance, so when building it, you need to know the length of the ramp required for the desired angle, as well as making the"rungs" (I don’t know what they are actually called) on said ramp flush with the ground.
Thanks !
[TRIGONOMETRY WARNING]
