expanding complex-valued functions in Julia

Question

In Wolfram Alpha I can use complex expand sin(x + Iy) to get back sin(x) cosh(y) + i cos(x) sinh(y). Is there a package in Julia or alternatively Python that does the same?

Answer 1

In Julia, I find this

using SymPy
@syms x,y
sympy.expand_trig( sin(x + im*y) )

#sin(x)⋅cosh(y) + ⅈ⋅cos(x)⋅sinh(y)

The similar solution can also be found in the library SymPy of Python.