ACOS logarithmic form

[Claudio L.]

(04-28-2016 08:58 PM)Valentin Albillo Wrote:  .
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.
.

Thanks for the link! Page 61 lists for ACOS the same formula as Wikipedia. Does this mean ACOS on the 15C returns the other values?
Can somebody run ACOS(2) on the 15C?