Trigonometric Functions for the HP38C/HP12C

03252016, 03:30 AM
Post: #1




Trigonometric Functions for the HP38C/HP12C
Some time ago, Gerson Barbosa wrote a really nice program to compute Trig functions on the HP12C and its predecessor, the HP38C.
I'm interested in the source of the coefficients: 3.333324820E01 STO 1 1.998722722E01 STO 2 1.397054038E01 STO 3 8.860960894E07 STO 4 1.349561365E11 STO 5 9.716369450E17 STO 6 More precisely, does anyone know if there exists a listing of these coefficients that show more digits? I now have an emulator of the HP38C (iPhone) that allows me to store constants of up to 15 or 16 digits, instead of 10 on the original machines. I've already taken care of the one in Reg 0 as I just took a 16 digit Pi and divided it by 180. My thinking is that if I can use longer coefficients I can probably get more accuracy. Although this program has a high degree of accuracy to begin with. Thanks! Regards, Bob 

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