### trigonometry

#### Replacing trigonometric functions in Sympy

I am trying to use Sympy to simplify some trigonometry. I realize that Sympy has a mature set of tools for dealing with this, so it seems like I must be missing something. However, I have spent a lot of time searching and can't seem to find exactly what I am looking for. Question: How do you expand a simple trig function into its complex components? MWE: x = Symbol('x',real=True) # The following works. Note that it expands cmplx functions into trig fncs exp(I*x).expand(complex=True) # Now try to go the other way expand(sin(x)) #nope expand_trig(sin(x)) #nope expand(sin(x),complex=True) #nope expand_complex(sin(x)) #nope I also tried replace, rewrite, and xreplace, but didn't get anywhere.

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