Updates:
Labels: -NeedsReview -smichr Simplify
Comment #4 on issue 3058 by smi...@gmail.com: solve cannot handle mixed
trig functions
http://code.google.com/p/sympy/issues/detail?id=3058
This is a simplification issue. Although the solver can return simpler
solutions, these are regressive in that one of the solution is being lost.
When trigsimp works better, perhaps they can be simplified:
[-2*atan(2 + sqrt(5)), -2*atan(-sqrt(5) + 2)]
>>> [w.n(3) for w in _]
[-2.68, 0.464]
>>> [w.n(3) for w in [atan(1/2) - pi, atan(1/2)]]
[-2.68, 0.464]
>>> [trigsimp(w) for w in _]
[-2*atan(2 + sqrt(5)), -2*atan(-sqrt(5) + 2)]
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