Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 2506 by [email protected]: simplification of tangent functions
http://code.google.com/p/sympy/issues/detail?id=2506
1) On doing simplify(tan(x-y)), I am getting -tan(-x+y) instead of the
regular identity.
2) on doing something like expand(cos(x+y)**2,trig=True) is giving
out "AttributeError" saying 'Pow' object has no attribute 'new'.
3) How can I say that cos(x)**4 == (1-sin(x)**2)**2. DO I have to make some
changes in the source code?
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