tan(pi/24), what is the correct result?

[Nick]

(09-06-2016 03:34 AM)Dol Wrote:  As of now, the problem remains that Torsten Manz HP15c calculator gives the RAD result even in DEG mode. Can someone else confirm this behavior so we can send a bug report to Torsten?
That is why I got confused and started trying different calculators in DEG mode.
Google displays the result in RAD (without explicit mentioning about RAD/DEG)

The following behavior may apply:

From the HP-15C Owner's Handbook (2011) p.121

Quote:Note: In Complex mode (signified by the C annunciator), the HP-15C performs all trigonometric functions using radians. The trigonometric mode annunciator in the display (RAD, GRAD, or blank for Degrees) applies to two functions only: [->R] and [->P] (as explained later in this section).

Quote:To deactivate Complex mode, clear flag 8 (keystroke sequence: [g] [CF] 8). The C annunciator will disappear.

HP-15C Owner's Handbook (2011) [hp.com]
HP-15C Advanced Functions Handbook (1982) [hp.com]

Edit: Added HP-15C Manuals Links