[ww-bugs] Bug 2634: Overzealous reduction of constant formulas

[bugzilla-daemon at webwork.maa.org]

http://bugs.webwork.maa.org/show_bug.cgi?id=2634





--- Comment #2 from Paul Pearson <paultpearson at gmail.com>  2013-06-14 14:38:06 ---
Hi Davide,

The original problem FortLewis/Authoring/Templates/Trig/DisableFunctions1.pg
did use Formula() instead of Compute, and it had the same problem. 
Specifically, using ww2.7 the value of Formula("cos(pi)"); was reduced to -1
when the desired output was \( \cos(\pi) \).  I know for certain that in some
older version of webwork (ww2.5.?.? or ww2.4.9?) this reduction did not happen
because I documented it on the wiki as an example problem (I even have a screen
shot!).  

In any case, the way I found to force non-reduction was using
Formula("cos(pi)") and 

Context()->constants->set(pi => {keepName => 1});

Please let me know if there is anything else that I should be doing.  I did
update the wiki page with this fix.

Thanks!

Paul

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