I'm trying to solve e^(i*pi) on a Casio fx-991CE X calculator.
The calculator is in Complex mode (MENU>2:Complex).
I Input e^(i*pi) and press "=" and get an error message instead of -1.
What am I missing? Thanks for your help in advance.
2026-03-27 23:39:01.1774654741
Problem using Casio fx-991CE X calculator to solve "e^(i*pi)"
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Yes, mine does the same thing. It probably wasn't programmed to recognise $e^{ix}$, but it does recognise $\cos(x)+i\sin(x)$, which is equivalent.