Revision history [back]
 | 1 | initial version |
I can't get Sage to do this directly either. Perhaps there is a way that I'm missing.
However, you can use SymPy to do it. The following code does the job.
import sympy as sp
sp.expand_trig(sin(pi/16))
However, the resulting object is not a Sage object. To get it in the appropriate ring for Sage computations, you can convert it to the Symbolic Ring as follows.
SR( sp.expand_trig(sin(pi/16)) )
The result will then have the type: sage.symbolic.expression.Expression.
You can check this by doing:
q = sp.expand_trig(sin(pi/16))
type(q)
