# PDE - Complex numbers

Larrytsai

## Homework Statement

Simplify the expression

e^(i6theta)[ (1+e^(-i10theta))/(1+e^i2theta)]

Answer should be in terms of cosines

but i dont know how to start this problem? :S

Also, does e^(-iwt) = - coswt -jsinwt?

K so Im thinking about Eulers formula, and I get an expression with Sines and cosines not just cosines =s

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