Yep, took up this exercise. Adding text labels is left as an exercise to the readers 
Also, Trig:: uses API calls — that’s how packs work (server-side execution only). Because of this, the doc takes quite some time to recalculate sines/cosines when you add or remove chart points — it makes round trips to the Coda backend instead of calculating it quickly right in the browser.
P.S. Doesn’t work with negative values. Left to the reader as well. This is just a demo how to approach the challenge in general.