1. ## De Moivre's Theorem

Show that for Θ E R Re ( e^iΘ/i+e^iΘ) is independent of Θ

2. 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.