Given:

Z= sqrt. of 2(cos(225degrees) +i sin(225degrees))^7

This the formula I'm using

Z^n= r^n(cos n deita + i sin n deita)

I tried to follow the formula but i keep getting it wrong.

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- Jul 30th 2008, 09:39 AMCyberman86De Moivre's Theorem finding powers
**Given:**

Z= sqrt. of 2(cos(225degrees) +i sin(225degrees))^7

This the formula I'm using

Z^n= r^n(cos n deita + i sin n deita)

I tried to follow the formula but i keep getting it wrong. - Jul 30th 2008, 10:25 AMTheEmptySet
- Jul 30th 2008, 10:27 AMPlato
Are you missing this?