The third in a series of posts comparing the introduction of trigonometry in traditional high school math vs. the Reform Math program Interactive Math Program.

**I. The next two pages of the first trigonometry chapter in A Second Course in Algebra** (published in 1937), pp.397-398 [click to enlarge]:

**II. The next two pages of the first trigonometry chapter in**pp. 8-9 [click to enlarge]:

*Interactive High School Mathematics Math Program Year 4*,
## 3 comments:

Not quite sure what the Tower of Hanoi problem has to do with trigonometry.

We have one partial victory!!!

Our kids' (private, L.A.-based) school sent out a letter today to parents saying that they are switching their "core" program from EM to Singapore "Math In Focus". However, the victory is very minor: they're only doing it for K and 1, and leaving 2, 3, 4, 5, 6, 7, and 8 with EM & Chicago Math. Those grades will have to wait a while. We're not sure about the roll-out time table, but it might be only the class of 2020 that gets the benefit of this.

Still, partial is better than nothing.

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