Status: Valid
Owner: ----
Labels: Type-Defect Priority-Medium Simplify
New issue 3821 by 16sn...@gmail.com: trigsimp does not simplify `cosh(z) -
sinh(z)`
http://code.google.com/p/sympy/issues/detail?id=3821
There are 4 expressions in this family which should be simplified to an
exponential type expression:
trigsimp(cos(z) + I*sin(z)) -> exp(I*z)
trigsimp(cos(z) - I*sin(z)) -> exp(-I*z)
trigsimp(cosh(z) + sinh(z)) -> exp(z)
trigsimp(cosh(z) - sinh(z)) -> exp(-z)
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