WP 34S vs. DM42 decimal128 differences?

[rkf]

(03-27-2018 07:58 AM)Nigel (UK) Wrote:  ... I'm counting significant figures from the first non-zero digit - i.e., what you say above. ...

OK - thanks for the clarification! BTW, this very situation is discussed in detail at p. 184 of the HP-15C Advanced Functions Handbook (although for the HP-15C's 10 shown, and 13 internal digits - thus giving, depending from interpretation, either ten, or three significant digits). Since the WP 34S, and DM42 behave with respect to sin(pi) in complete accordance with the HP manual cited above, I'm fine with the status quo. :-)