Who has a sinclair scientific programmable?

[naddy]

(12-04-2024 09:20 PM)Johnh Wrote:  So here's a puzzle for anyone for whom it's not trivially obvious: Try to remember how to get the other 3 trig functions (arcsin, arccos and tan)?

I think \(\tan x = \frac{\sin x}{\cos x}\) is generally known, but why would you remember the arc functions? That's what GIECK or BRONSTEIN are for, or whatever formula collections engineers in other countries use(d before Wikipedia).