Accuracy of Integral with epsilon

10082021, 10:17 PM
(This post was last modified: 10092021 12:51 AM by toml_12953.)
Post: #2




RE: Accuracy of Integral with epsilon
(10082021 09:57 PM)lrdheat Wrote: I was surprised that my TI30X Pro MathPrint came up with a more accurate solution to the integral (2*e^x)/(cosh (x) + sinh (x)) from 10 to 10 using an epsilon of 10^4 or greater. I was naively thinking that the stock epsilon of 10^5 or smaller would yield a more accurate result. The actual answer is 40. My TI cx ii was accurate to 5 digits as is the TI30X Pro MathPrint and CASIO fx991X. The CASIO fxCG50 is accurate to 6 digits, the HP Prime in home mode thought about it a bit, and was accurate to 7 digits. The WP 34S on my SwissMicros in double precision quickly produced an answer accurate to 27 digits! I don't understand what you mean about Prime being accurate to 7 digits. I get 40 exactly on Prime in home mode. Tom L Cui bono? 

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