RE: Haskell 98 - Standard Prelude - Floating Class
That's a good idea too. Is there a reason for defining acosh as above instead of acosh x = log(x + sqrt(x*x-1)) If there is one I can't remember it. :-)
-- Lennart
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 How about making default method for asin asin x = atan(x/sqrt(1-x^2)) Can't be worse than the default for (**) ;-) - -- Russell O'Connor roconnor@alumni.uwaterloo.ca <http://www.math.berkeley.edu/~roconnor/> ``This is not a time, as it is never a time, to seek vengeance, but a time to seek the courage to forgive'' -- George W. Bush -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (SunOS) Comment: For info see http://www.gnupg.org iD8DBQE71gyFZG3em5NXM14RAsTUAKCfalnIJ/JsBDak0V7jhgesMGrg0ACg1mJr 3Yx6mHcAQ7nyy02UMTdG/L0= =oJdQ -----END PGP SIGNATURE-----
roconnor@math.berkeley.edu wrote:
How about making default method for asin
asin x = atan(x/sqrt(1-x^2))
Can't be worse than the default for (**) ;-)
Oh, it can. As well as its own problems when x is close to 1, it inherits, through the default definition of sqrt, the problems of (**) when x is near 0. --brian
participants (3)
-
Brian Boutel -
Lennart Augustsson -
roconnor＠math.berkeley.edu