ACOS logarithmic form

[Valentin Albillo]

.
Hi, Ángel:

(04-28-2016 06:42 PM)Ángel Martin Wrote:  It's commonly accepted to define as "principal" branch the solution with argument between -pi and pi. This is covered with good explanations in the 15C Special Functions Manual, I'm sure somebody here will be able to point at its URL...

Here you are:

HP-15C Advanced Functions Handbook

Best regards.
V.
.