Status: Accepted Owner: [email protected] Labels: Type-Defect Priority-Medium
New issue 2743 by [email protected]: expand_trig should work for hyperbolic trig functions
http://code.google.com/p/sympy/issues/detail?id=2743 In [155]: cosh(x + y).expand(trig=True) Out[155]: cosh(x + y) In [156]: cos(x + y).expand(trig=True) Out[156]: -sin(x)⋅sin(y) + cos(x)⋅cos(y) The answer should be In [158]: cos(x + y).expand(trig=True).subs({x: I*x, y:I*y}) Out[158]: sinh(x)⋅sinh(y) + cosh(x)⋅cosh(y) -- You received this message because you are subscribed to the Google Groups "sympy-issues" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy-issues?hl=en.
