error when evaluating symbolic expression involving cotangent of a complex number #29409
Description
This issue is split off from #29400. The command cot(1 + I).n() gives a TypeError:
sage: cot(1 + I).n()
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-6-8ad83d3021de> in <module>()
----> 1 cot(Integer(1) + I).n()
[snip]
/Users/dmorris/Documents/misc/Programs/sage3/local/lib/python3.7/site-packages/sage/symbolic/expression.pyx in sage.symbolic.expression.Expression.numerical_approx (build/cythonized/sage/symbolic/expression.cpp:34715)()
6054 res = x.pyobject()
6055 else:
-> 6056 raise TypeError("cannot evaluate symbolic expression numerically")
6057
6058 # Important -- the we get might not be a valid output for numerical_approx in
TypeError: cannot evaluate symbolic expression numerically
There is no such error for sin, cos, tan, sec, or csc.
I believe this can be fixed by renaming the cotan method of the ComplexNumber class to cot, and I will upload a PR soon.
Component: symbolics
Keywords: cotangent, complex
Author: Dave Morris
Branch/Commit: b941d30
Reviewer: Kwankyu Lee
Issue created by migration from https://trac.sagemath.org/ticket/29409