http://code.google.com/p/sympy/issues/detail?id=3500

In [2]: limit((n+cos(n))/n,n,oo)
Out[2]: nan

Should be 1, due to cos(n) is limited.

It seems that there are problems with calculating limits of oscillating 
functions, e.g.

In [3]: limit(cos(n),n,oo)
Out[3]: cos(∞)

Which should return nan instead or show that there is no limit in other way.


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