On Sun, Jul 21, 2024 at 04:30:26PM +0200, Emanuel Berg wrote:

[..]

> (defun hypotenuse (c1 c2)
>   (sqrt (+ (* c1 c1) (* c2 c2))) )

Conceptually, yes. Practically... just no.

The shallow (handling /just/ overflow):

  https://www.johndcook.com/blog/2010/06/02/whats-so-hard-about-finding-a-hypotenuse/

The deeper (but with /very/ nice pics):

  https://www.cs.umd.edu/~ntoronto/papers/toronto-2014cise-floating-point.pdf

(I guess Calc is already beyond your formula).

Cheers
-- 
t