Precalculus By Richard Rusczyk.

https://ia800101.us.archive.org/22/items/precalculus-by-richard-rusczyk/Precalculus%20by%20Richard%20Rusczyk.pdf nostr:note1nsfyj798s0xhnn9cqznfpjl8x437g3xtajq3ncm9dfn2t0y8ve7sdw6emp