Swiss army knife equations

[Michael de Estrada]

The HP 33s can do all of this as well, and it cost $20 less than the 35s when it was still being made. In fact, Chapter 14 of the HP 33s user's guide is word for word identical to Chapter 15 of the HP 35s User's Guide. It also didn't eat batteries, had direct rectangular<>polar coordinate conversions, and separate dedicated primary keys for STO and RCL.