Simplifying Slide Rule Calculations with Trig

[Bob the Science Guy] remembers how to use a slide rule. Even after all these years, it is pretty easy to remember how to multiply and divide. If you can’t remember, you can usually work it out, as long as you understand how slide rules work. But what about sine, cosine, and quadratics? [Bob’s] been making videos about topics like this, and if you’ve wanted to put your slide rule collection to practical use, you’ll enjoy these videos. You can see one below. The trick to the slide rule is that it is deceptively simple. You are in effect adding logarithms and then taking an antilog. The

https://hackaday.com/2026/10/16/simplifying-slide-rule-calculations-with-trig/

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