Status: Valid
Owner: ----
Labels: Type-Defect Priority-Medium Evalf
New issue 3608 by asmeu...@gmail.com: Issues with trigfunctions.equals
http://code.google.com/p/sympy/issues/detail?id=3608
Originally reported at https://github.com/sympy/sympy/issues/1740:
There is an issue with testing equality regarding 1/sin(x) and csc(x). When
comparing using the equals() method from one to the other, it raises a
ZeroDivisionError.
import sympy
cosecant = sympy.csc('x')
alternate = 1/sympy.sin('x')
#these produce ZeroDivisionErrors
cosecant.equals(alternate)
alternate.equals(cosecant)
And response:
I will most likely not be able to submit a patch for this for at least two
months (I'll be busy) so feel free to take on this issue.
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