Video from 10/8 Kind of all over the map, from Chapter 3 Written Work to 4.2 Theory, and a lightning-
fast intro to 4.3 and 4.4. But I think you'll see, when you start working it, that you already knew a lot of this stuff, and it's pretty natural.
Good material for the Midterm.
Notes (Edited. Better.) 10/10. I fixed my answer to
Ajay's question about Chapter 3 Written work. The water-skier question. My trig substitution was OK, but
I forgot the integral of the sine, and I went blind about the arctanh term.