ObsessiveMathsFreak wrote :
I have complex formulas involving several occurances of complex
exponentials. e.g. e^(2*I*theta), e^(3*I*theta)
I would like to find the real part of the expression (there are
several variables), but when I do so, the expression becomes unwieldy
with a lot of terms like
sin(-2*real_part(theta)) showing up.
How can I avoid this behaviour, simply getting sage to recognise that
theta is real, and that I just want it to expand e^(it) into cos(t)
+i*sin(t)?
Yous may also load the attached "rewrite????.sage" file at page
http://wiki.sagemath.org/symbolics/rewrite,
if you dislike to define subs and rewrite rules.
F.
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