The one thing in Thompson's presentation that I didn't particularly like is how he introduces derivatives of trig functions. It presumes that the reader has a lot of trig identities in their back pocket, and it makes a simplification that is hard to justify without going into limits, a topic that Thompson doesn't teach. I've tried my hand at a replacement that appeals to the way he *does* teach.

https://www.sunclipse.org/wp-content/downloads/2023/10/revising.pdf

... Did a little more work on this:

https://www.sunclipse.org/wp-content/downloads/2023/10/revising.pdf

... Here is my de-archaized version of *Calculus Made Easy*, with the shillings and the obsolete names for things we now know to be polonium isotopes all fixed up:

https://www.sunclipse.org/wp-content/downloads/2023/10/revising.pdf

And here is how the LaTeX stands at the moment:

https://www.sunclipse.org/wp-content/downloads/2023/10/calculus-made-easy.tgz

Here is my summary blog post about my *Calculus Made Easy* project and where it stands now:

https://www.sunclipse.org/?p=3194

#calculus #mathematics

The source linked in my blog post now includes the cover images for printing my *Calculus Made Easy* update (in the .tgz file).

https://www.sunclipse.org/?p=3194

As the picture upthread illustrates, I ordered ten paperback copies of my *Calculus Made Easy* updated edition from a print-on-demand service. I've now given them all away, one as a holiday gift and the other nine as bonus freebies at a friend's art show.

I should get serious about this and do another print run. Sadly, the local bookshop that used to offer POD stopped doing that. For this trial run, I used Lulu, for the sophisticated reason that I had an account there because of projects we did years and years ago. Cost per paperback: $8.40.