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. N says:

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: https://en.wikipedia.org/wiki/Law_of_sines

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. shjescaresme says:

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. Nicholas says:

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. Jimmy Smith says:

Sin x / n = 6

3. Nathaniel Kingsbury says:

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

4. Will Day says:

Real mathematicians hate Polar Bears. That’s why they heated up Mother Earth.