[Maxima-bugs] [ maxima-Bugs-1690374 ] asin(1 / sqrt(2))

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Bugs item #1690374, was opened at 2007-03-29 01:41
Message generated for change (Comment added) made by rtoy
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Category: Lisp Core - Trigonometry
Group: None
Status: Open
Resolution: None
Priority: 4
Private: No
Submitted By: Barton Willis (willisbl)
Assigned to: Nobody/Anonymous (nobody)
Summary: asin(1 / sqrt(2))

Initial Comment:
Maxima doesn't know that asin(1/sqrt(2)) = %pi/4.

(%i9) asin(1/sqrt(2)), %piargs : 'true;
(%o9) asin(1/sqrt(2))

Here is a workaround (is there something better?)

(%i10) %,logarc, rectform;
(%o10) %pi/4

Maxima does know asin(1/2) = %pi / 6:

(%i11) asin(1/2), %piargs : 'true;
(%o11) %pi/6



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>Comment By: Raymond Toy (rtoy)
Date: 2007-04-02 12:34

Message:
Logged In: YES 
user_id=28849
Originator: NO

After looking at the code in simp-%asin, it seems like an oversight that
it doesn't handle 1/sqrt(2).

I'll try to patch that up soon.


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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1690374&group_id=4933