The Seven Deadly Sin(e)s

moral transgressions as identified by trigonometry teachers

11 thoughts on “The Seven Deadly Sin(e)s

  1. The bad bit is that for small enough x, x ≅ sin(x), which can lead you into temptation.

    Similarly, the fact that 2^4 = 4^2 can create false-positive “simple test cases”.

    “1 doesn’t count, 3 is prime, 5 is prime, 7 is prime, 9 is an experimental error, 11 is prime, 13 is prime, …. Good enough: all odd numbers are prime.”

    1. I think it’s not a right triangle, so the sohcahtoa rule doesn’t work. There’s something else you have to multiply it by to make it work again when it’s not a right triangle, but I’ll have to look it up:

      so it should be:

      sin theta / opp = sin the angle that looks like its right but it’s not / hypoteneuse = sin the other angle / adjacent

        1. I think it’s because the “triangle definition” of sine does not extend to angles > pi/2. You never get negative values of sin if you define it as a ratio of (positive) lengths

    2. I think sin (3 Pi /2 ) = -1 i.e. it has an elegant solution, where sin (3/2) does not which is the joke.

  2. Don’t forget the wrath of complex number advocates, who scream that sin(x) = 1.5 has PLENTY of solutions.

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