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## Homework Statement

Using De Moivres Theorem, solve (-12-5i)^-3

## Homework Equations

## The Attempt at a Solution

The solution i get for this problem is different from the one given in the exercise text. This is 1/2197cis(8.241)

Note: cis is equivalent to cos([tex]\Theta[/tex])+isin([tex]\Theta[/tex])