Comment #10 on issue 1274 by ondrej.certik: trigsimp doesn't like decimals
http://code.google.com/p/sympy/issues/detail?id=1274
Ah, I got it. But this returns an exception to me:
In [3]: trigsimp(cos(x)**2.0000 + sin(x)**2.0000)
[...]
/home/ondrej/repos/sympy/sympy/core/numbers.pyc in __eq__(self, other)
368 if other.is_irrational: return False
369 return other.__eq__(self)
--> 370 if other.is_comparable: other = other.evalf()
371 if isinstance(other, Number):
372 return bool(mlib.mpf_eq(self._mpf_,
other._as_mpf_val(self._prec)))
TypeError: unbound method Basic_evalf() must be called with cos instance as
first
argument (got nothing instead)
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