Yes, 355÷113 is very close to π, but is not equal to π

So how does it get things ‘right’ for cos(355÷113), but not right for sin(355÷113)?

And why is the error of π-355÷113 exactly the same as the error of sin(355÷113)?

I sense some fuckiness of how they handle π…

  • @over_cloxOP
    0•2 days ago

    I almost guarantee you all my calculators are configured for degrees for these tests. I edited my comment after testing 4 different calculators.

    Now I just don’t know why two of them give me -1 and the other two give me +1.

    Edit: I may have to learn more about this Casio, but still I’m getting conflicting results between other calculators, including modern Linux Calculator.

    • zkfcfbzrEnglish
      2•2 days ago

      The correct answer in degrees is cos(pi) = 0.99849714986386383364. The correct answer in radians is cos(pi) = -1 (exactly). Any calculator giving you cos(pi) = -1 is definitely in radians mode - and if you mean you’re getting cos(pi) = exactly 1, and not 0.998, then that should never happen in any mode, unless it just has two digits of accuracy. Which I doubt any calculator with a ‘cos’ button has ever had.

      For the record, if using sine, you should have sin(pi) = 0.05480366514878953089 if in degrees mode, or sin(pi) = 0 (exactly) if in radians mode.