Easter Sunday Trigs ( rpn38-CX)

[Gerson W. Barbosa]

In the previous post I forgot to include a couple HP-12C Platinum results to demonstrate the difference two extra digits can make. Here they are:

0.9999 GTO 038 R/S --> 0.8102914375 ; arccos(0.9999 deg)

0.155 GTO 044 R/S --> 8.810732983 ; arctan(0.155)

Compare these with the results obtained on the HP-38C/12C.

Since we're talking 38, just another calculation involving a few instances of 38 on both calculators:

HP-38C/12C:

0.788888888 ENTER 1138.777777 1/x - GTO 38 --> 38.00000006

HP-12C Platinum/Prestige:

0.788888888 ENTER 1138.777777 1/x - GTO 038 --> 37.999999999

Can you guess what the actual 10-digit result might be? :-)