 Rank: Newbie
Groups: Registered
Joined: 09/11/2009(UTC)
Posts: 2
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Hi,
i think I found a nasty bug in the SMath desktop (windows) v0.85.3578.
let us consider an expression:
arccos(-0,3536)=
we get a correct result: 1,9322
however, if we do the same, but with an intermediate assignment to a variable:
a:=arccos(-0,3536)
a=
we get a result: 1,2094
after performing the reversed calculations we get:
cos(1,9322)=-0,3536 - correct
cos(1,2094)=0,3536 - invalid sign
Witold Andrzejewski
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  Rank: Administration Groups: Registered, Advanced Member Joined: 23/06/2009(UTC) Posts: 1,740   Was thanked: 318 time(s) in 268 post(s)
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From SMath Studio Live Open in SMath CloudOn the other hand, in 0.85_3578 there is no arccos but acos function acos(-0,3536)=1,9322a←acos(-0,3536)a=1,2094Regards, Radovan Edited by user 10 November 2009 14:36:22(UTC)
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When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!" |
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Rank: Newbie
Groups: Registered
Joined: 09/11/2009(UTC)
Posts: 2
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Ok, so the bug is confirmed. I'm glad it isn't some configuration specific glitch 
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 Rank: Administration Groups: Developers, Registered, Knovel Developers, Administrators, Advanced Member Joined: 11/07/2008(UTC) Posts: 1,616  Was thanked: 1978 time(s) in 666 post(s)
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I've reproduced it too (and I'm not glad about that  ). Thank you! Will check and fix. P.S.: omorr, sorry I'm not answered o you in PM, but I've got a bug with undo/redo as well, so, many thanks to you - will fix it. Updated: about acos vs arccos. It is an option of the SMath Studio. You can set functions name type via Options > Interface > Functions style (...and program knows about right value of this option for 22 countries). Edited by user 10 November 2009 23:47:48(UTC)
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Rank: Administration Groups: Registered, Advanced Member Joined: 23/06/2009(UTC) Posts: 1,740 Was thanked: 318 time(s) in 268 post(s)
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smath wrote:P.S.: omorr, sorry I'm not answered o you in PM, but I've got a bug with undo/redo as well, so, many thanks to you - will fix it. Not at all smath wrote:Updated: about acos vs arccos. It is an option of the SMath Studio. You can set functions name type via Options > Interface > Functions style (...and program knows about right value of this option for 22 countries). Oh yes, you are right. I forgot about it, sorry. I could (or someone else) extend the wiki page concerning multilanguage support. Regards, Radovan |
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!" |
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Rank: Administration Groups: Developers, Registered, Knovel Developers, Administrators, Advanced Member Joined: 11/07/2008(UTC) Posts: 1,616 Was thanked: 1978 time(s) in 666 post(s)
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witek wrote:a:=arccos(-0,3536)
a=
we get a result: 1,2094 Error fixed:  Fix will be available into the next SMath Studio version. Thank you for the report.
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