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From: BGB <cr88192@hotmail.com>
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Subject: Re: higher precision doubles
Date: Sat, 06 Aug 2011 16:12:51 -0700
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On 8/6/2011 2:30 PM, Jan Burse wrote:
> BGB schrieb:
>> also possible is, of course, to use BigDecimal or similar (as others
>> have noted), or implement ones' own higher-precision floating point
>
> BigDecimal Ops with MathContext would probably do, although I
> have never tried it. But would need to do my own DECIMAL80,
> since there is only DECIMAL64 and DECIMAL128. And would not
> cover any exponent restriction, only mantissa restriction.
>
> But wait, would BigDecimal really do? I am asking here for
> pi and sin. But when I look at BigDecimal I only see some
> basic arithmetic and some number theory.
>
> So where is the trigonomy package for BigDecimal?
>

I am not aware of any (but, Java is not my main language FWIW), but it 
is possible for one to write these themselves.

for example, see here:
http://en.wikipedia.org/wiki/Taylor_series
and:
http://en.wikipedia.org/wiki/Trigonometric_function

I had actually done this when implementing some of my own math functions 
(mostly in the case of implementing quaternions and also a float128 
type), however, this was in C.


> Bye
>
> http://download.oracle.com/javase/1,5.0/docs/api/java/math/BigDecimal.html
> http://download.oracle.com/javase/1,5.0/docs/api/java/math/MathContext.html
>
>