Out of curiosity on how computation of complex domain
elementary functions can be done, I got a rare 4083-3. For a
25cm straight slide rule the accuracy is about 3 to 4 digits
with estimation, which is close to what today's half-
precision binary floating-point can get. It lacks K scale
for cubic square/root compared to the more common Decitrig
model 4081, but the Log Log scales compensate for that.
The supplement manual only did explain how to compute
hyperbolic functions of complex numbers, but I am able to
find other resources that gives the formula and it is a
surprise the same formula is still used by Common Lisp and
gives good accuracy. I have also added several uncommonly
seen tricks not converged in the Decitrig manual to prove
that Log Log Vector can compute anything that an electronic
scientific calculator could do, albeit it needs skills and
knowledge to close that gap.
