Re: HP 35s trigonometric functions alternative Message #4 Posted by Lyuka on 31 Aug 2007, 4:41 a.m., in response to message #3 by Gerson W. Barbosa
Thanks.
I really want the bug-fixed version of the HP 35s.
By the way, I have no other reference since it is a kind of my original.
Taylor series, the continued fraction, Chebyshev approximation,
and Pade approximation itself are all well known mathematical method.
However, I thought a method that optimise only the coefficients of
the parts which have smaller computational error sensitivity,
based on rational Chebyshev approximation.
'pi' in my program is coded as
builtin PI (3.14159265359) - 2.06761537357E-13
this yields 25 digits pi approximation 3.141592653589793238462643.
Regards,
Lyuka
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