Comment #62 on issue 966 by Vinzent.Steinberg: Can't simplify exp(2 * pi *
I * a) when a is integer
http://code.google.com/p/sympy/issues/detail?id=966
Sorry for the late reply. I updated your branch for current master (see my
github
account) and still get the same failure:
In [6]: _undetermined_coefficients_match(4*x*sin(x - 2), x)
Out[6]: {test: True, trialset: set(x⋅cos(2 - x), x⋅sin(2 - x), cos(2 - x),
sin(2 - x))}
In [7]: {'test': True, 'trialset': set([x*cos(x - 2), x*sin(x - 2), cos(x -
2),
...: sin(x - 2)])}
Out[7]: {test: True, trialset: set(-sin(2 - x), x⋅cos(2 - x), -x⋅sin(2 -
x), cos(2 - x))}
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