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Ф-ла Муавра: ![(a+ib)^n=r^n(cos(nvarphi)+isin(nvarphi)) (a+ib)^n=r^n(cos(nvarphi)+isin(nvarphi))](https://tex.z-dn.net/?f=%28a%2Bib%29%5En%3Dr%5En%28cos%28nvarphi%29%2Bisin%28nvarphi%29%29)
![a=1 \ b=-1 \ r= sqrt{1+1}= sqrt{2} \ a>0 \ argZ=arctg -frac{1}{1}=arctg(-1)=- frac{ pi }{4} \
(1-i)^{12}= sqrt{2}^{12}(cos(12*(- frac{ pi }{4}) )+isin(12*(- frac{ pi }{4}) ))= \ =
2^6(cos3 pi -isin3 pi )=64(-1-i*0)=-64 a=1 \ b=-1 \ r= sqrt{1+1}= sqrt{2} \ a>0 \ argZ=arctg -frac{1}{1}=arctg(-1)=- frac{ pi }{4} \
(1-i)^{12}= sqrt{2}^{12}(cos(12*(- frac{ pi }{4}) )+isin(12*(- frac{ pi }{4}) ))= \ =
2^6(cos3 pi -isin3 pi )=64(-1-i*0)=-64](https://tex.z-dn.net/?f=a%3D1+%5C+b%3D-1+%5C+r%3D+sqrt%7B1%2B1%7D%3D+sqrt%7B2%7D+++%5C+a%26gt%3B0+%5C+argZ%3Darctg+-frac%7B1%7D%7B1%7D%3Darctg%28-1%29%3D-+frac%7B+pi+%7D%7B4%7D+%5C+%0A%281-i%29%5E%7B12%7D%3D+sqrt%7B2%7D%5E%7B12%7D%28cos%2812%2A%28-+frac%7B+pi+%7D%7B4%7D%29+%29%2Bisin%2812%2A%28-+frac%7B+pi+%7D%7B4%7D%29+%29%29%3D+%5C+%3D%0A2%5E6%28cos3+pi+-isin3+pi+%29%3D64%28-1-i%2A0%29%3D-64)
Приложения:
![](https://st.uroker.com/files/0be/0bea01e1568299e7eb61dab02640f88a.png)
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