• lowleveldata@programming.dev
    1·
    5 months ago

    That’s how you know math is OP when you can calculate volumes in parallel worlds where circles don’t even looks like circles

  • RegalPotoo@lemmy.worldEnglish
    0·
    5 months ago

    Idk, if you want to test people on how they understand formulae and order of operations without letting them just punch it into a calculator. The actual math isn’t hard, but if you don’t get substituting values into an equation then it’s not trivial

          • Norgur@fedia.io
            0·
            5 months ago

            Oh don’t you try to sell me on the “you won’t always have a calculator in your pocket” thing. I have fucking Excel in my pocket.

            • notabot@lemm.ee
              1·
              5 months ago

              It’s not just about haveing a calculator, it’s also that it’s faster and more convenient if you can do simple sums like this in your head. It also means you can sanity check the numbers your calculator gives you to make sure you didn’t make a mistake entering the sum.

              To your point below about products having their unit cost displayed, more than once I’ve seen that just be wrong, so I wouldn’t rely on it. Make sure you can check it in your head.

            • Serinus@lemmy.world
              0·
              5 months ago

              Who really wants to use Excel to figure out if the 24-pack of Coca-Cola or the 3 12 packs is a better deal?

              • Norgur@fedia.io
                0·
                5 months ago

                I don’t need to, there’s a legal requirement to print prices per liter or kg on every price tag here.

                • HopFlop@discuss.tchncs.de
                  0·
                  5 months ago

                  But if you want to buy only half a kg, you don’t know how much it costs (if you dont know basic maths)- because it only lists the price for a full kg. Do you start pulling out your Excel for that?

  • Lemvi@lemmy.sdf.org
    0·
    5 months ago

    With π=5 maths break down completely. If π=5, then e^(5i) = -1, meaning -1 = cos(5) + i * sin(5), or -1 ≈ 0.284 - 0.959 i

    • Bob@feddit.nl
      0·
      5 months ago

      I think you’re overthinking it. The first thing you’re told when you learn algebra is that a letter represents a number and you can say “let a equal (number), b equal (number)…” so you can let pi equal whatever you want for the purposes of one simple problem.