ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Tue, 23 Sep 2014 15:19:05 +0200Sage does not simplify trigonometric expresionhttps://ask.sagemath.org/question/24256/sage-does-not-simplify-trigonometric-expresion/Hello,
the sage does not simplify the expression
a(phi) = (1 - cos(phi)) / sin(phi)
to tan(phi/2)
what wolfram alpha does...
is this a bug or a feature??Tue, 23 Sep 2014 14:26:55 +0200https://ask.sagemath.org/question/24256/sage-does-not-simplify-trigonometric-expresion/Answer by kcrisman for <p>Hello,</p>
<p>the sage does not simplify the expression</p>
<p>a(phi) = (1 - cos(phi)) / sin(phi)</p>
<p>to tan(phi/2)</p>
<p>what wolfram alpha does...</p>
<p>is this a bug or a feature??</p>
https://ask.sagemath.org/question/24256/sage-does-not-simplify-trigonometric-expresion/?answer=24258#post-id-24258You can go the other way around, I think, but not this way. Somewhat surprisingly, [Maxima doesn't even seem](http://maxima.sourceforge.net/docs/manual/en/maxima_10.html#IDX401) to support this. But I would be happy to be shown wrong.Tue, 23 Sep 2014 15:19:05 +0200https://ask.sagemath.org/question/24256/sage-does-not-simplify-trigonometric-expresion/?answer=24258#post-id-24258