De Moivre's Theorem

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• October 28th 2008, 07:41 AM
ricrock
De Moivre's Theorem
Hey guys could someone please help me out? Don't know where to start with this question...

Show that for Θ E R Re ( e^iΘ/i+e^iΘ) is independent of Θ
• October 28th 2008, 07:59 AM
Plato
Use the fact about complex fractions.
$\Re \left( {\frac{z}
{w}} \right) = \frac{{\Re \left( {z\overline w } \right)}}
{{\left| w \right|^2 }}$
.

P.S. You allowed only 12 min. before bumping.
To bump is against forum rules.