hp35s amazon reviews VS MoHPC reviews

[DA74254]

(10-29-2017 06:23 PM)Mark Hardman Wrote:  Try comparing the results for cos(89.99), cos(89.999); you will see errors of 7.0E-15 and 1.0E-14 respectively.

Ah, OK.
So better use more digits then ;-)
Then again, the 35s is accurate to 12 digits, thus at E-14 you are beyond the guaranteed accuracy of the calc.