I have the following sympy code:
W, k = symbols('W k', real=True)
expr = exp(W)*(exp(I*k) - exp(-I*k))
print(expr)
and I would like sympy to simplify it to:
exp*(W)(2*I*sin(k)
I have tried expr.simplify()
and expr.trigsimp()
but they don't substitute any trig functions. The only partial solution I was able to find is
expr.rewrite(cos).trigsimp()
but this also expands exp(W)
to hyperbolic sine/cosine, which I don't want.
Ok, using
expr.rewrite(cos).simplify()
worked.