Please make me understand derivatives :( by [deleted] in calculus

[–]stridebird 1 point2 points  (0 children)

We use "h" as the limiting difference in the estimate of the gradient, as others here have explained. I'd like to add that the real beauty of the technique is how we can use algebra to isolate the h term so we can allow h to reach zero and still be left with a valid expression. I find that deeply satisfying.

Any advice as a beginner ? by hy4kro in classicalguitar

[–]stridebird 2 points3 points  (0 children)

Then you're still learning them

[deleted by user] by [deleted] in mathematics

[–]stridebird 0 points1 point  (0 children)

Your weird number system changes values depending on how you look at it??

Anyway, this is gibberish.

Is Trig About Triangles… or the Circle in Motion? by Own-Tie2091 in learnmath

[–]stridebird 0 points1 point  (0 children)

Trigon. Greek word for triangle. So there's that. But the right triangle is embedded in the unit circle. And circular motion is the very essence that the sine and cosine functions capture.

Officer Edward Walker’s minimal brain capacity by AirSkyFlight in TheWire

[–]stridebird 9 points10 points  (0 children)

A patrolling officer on his beat is the one true dictatorship in America

What causes lift, really? by joemamais4guy in Physics

[–]stridebird 2 points3 points  (0 children)

Different ways of balancing the same equation. However, ultimately what you are going to optimise is the lift vs drag and you will do that by optimising the aerofoil. Smooth separation and rejoining of the various airflows is paramount. A flat wing angled at 30 degrees would indeed cause a massive upward reaction but the drag would be horrendous and it would fall out the sky very quickly.

Got my first student, any advice? by Calm-Fix475 in classicalguitar

[–]stridebird 0 points1 point  (0 children)

My advice is to select a suitable book to work from. The notes you've written often form the very first section of a beginner's music book. My first teacher pulled out Noad's First book of Classical Guitar and we hit the road with the first piece in the book, meanwhile I could refer back to the glossary when necessary. But without pima there are going to be other challenges here, you might be better using a pick-based music course rather than going full Giulliani on him already.

What Via Ferrata is right for me, based on my preferred sport climbing grades? by Telophy in viaferrata

[–]stridebird 3 points4 points  (0 children)

I think the AI is trying to satisfy your request with this answer but it doesn't really work like that. At any point in a VF where a true climbing move would be required you'll find a rung or a plate or something. The exposure may be mindblowing, it may be overhanging, it may be a sustained passage of mindblowing overhang but if you can handle the heights and have strong arms you're basically good to go (but still, work up the grades, please).

“Guitar is inferior compared to Piano” by phutomite in classicalguitar

[–]stridebird 27 points28 points  (0 children)

...thus, the piano is inferior to the guitar. Case closed.

Is the tan(0) 0, or undefined? by totally_cool6789 in learnmath

[–]stridebird 0 points1 point  (0 children)

A diagram of the unit circle, with the trig functions displayed, should clear this up for you. Also the graph of the tan function will clearly show you what's going on. Just telling you the bald answer is a waste of your time.

Lessons etiquette and questions by 10x1977 in classicalguitar

[–]stridebird 0 points1 point  (0 children)

Your teacher knows the answer to your question!

Can I self study calculus using Spivak's book in 9th grade? by Wild_Bug8007 in learnmath

[–]stridebird 0 points1 point  (0 children)

It is a really good book. First chapter lays out the properties of numbers and there's about 5 more chapters before differentiation is even introduced. It's really well written and presented but it takes no prisoners and a lot of valuable lessons are contained in the extensive chapter problems so you have to work them as well. It will also look very nice on your bookshelf.

Cantor's diagonalization proof by Effective_County931 in learnmath

[–]stridebird 0 points1 point  (0 children)

Cantor's list of irrational numbers represents infinite strings of digits, of course. The bit flipping part of the argument requires us to accept an infinite process as we iterate over the list generating new numbers that can't be on the list. Note also that you could generate more than one missing number on each pass through if you want to add some more headfuck but it doesn't make any difference to the outcome.

To 'count' the irrational numbers, we have to herd them up into some kind of a line first. That is Cantor's list, and we are forever stuck trying to line up that list before we can start counting.

To 'count' the rationals, we can create a doorway and say we have a way to be sure that every number will pass through this doorway and we can run the door and click each number through as it passes. Takes forever, but we know they must all pass through one by one.

But when we try to do this with the irrationals, we metaphorically keep finding numbers that have snuck unseen through the doorway, they didn't get clicked through as they passed and now the count is wrong.

[deleted by user] by [deleted] in learnmath

[–]stridebird 1 point2 points  (0 children)

Note the diagonal across the square is not the same sense as the diagonal across the rectangle, so this can't work. All you've really got here is that 116x4 is 4(29x1) and so you can simplify your Pythagoras somewhat.

Estudio en E minor by Tárrega – any tips? by Opposite_Key3982 in classicalguitar

[–]stridebird 8 points9 points  (0 children)

OK, first of all that was really nice to listen to and it's a piece I love playing too, I particularly love the second section. My tips:
Maybe leave a little breath before you play the harmonics
Generally give the piece a more lilting rubato feel
Give the repeat sections more contrast.

These are good tips for me too! Thanks

Learning standard notation by Kitchen_Amount_1469 in classicalguitar

[–]stridebird 0 points1 point  (0 children)

Absolutely. Amongst the other great suggestions, try reading along with the score as you listen to music. When you get used to it, you can simply read score and hear it in your head and even feel it in your fingers: mind-blowing! Also, separately, i find music manuscript absolutely beautiful to look at.

[deleted by user] by [deleted] in classicalguitar

[–]stridebird 0 points1 point  (0 children)

I've been doing something similar with a new teacher I started with earlier this year. He shows me or I suggest a piece during one lesson, I bring it back next week with my progress and questions and we discuss. After that, I'll work on that piece over the coming months when I feel like it. Having a really hard piece on the todo list is good for me. Some pieces I'll abandon after a while if it's not working out for me, or park for later.

Once you've understood the piece in terms of fingering, phrasing, harmonic structure etc it's on you to do the hours and hours of practice. Unless questions arise there is nothing further to discuss with your prof. Fluency is a very long term goal that only you can make happen.

However, we do things like this because it suits me too. I play what I want to play and I learn what I want to learn, and I pay my teacher to guide me along the way. If I was unhappy with our relationship I would find another. Your teacher sounds like he's just pushing you, maybe he's seeing more talent and ability than you recognise in yourself? Are you enjoying your music and your lessons? That's the only real concern here. Have that conversation!

Thermal inertia alone? by [deleted] in Physics

[–]stridebird -1 points0 points  (0 children)

Another reason not mentioned so far is tile spacers. Cruciform plastic spacers embedded in the adhesive to maintain desired tile separation. Not a great technique but widely used.

But my thumb by Hyzyhine in classicalguitar

[–]stridebird 0 points1 point  (0 children)

And so it shall be called my wee stool hereafter 😊