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[(1+cos(pi/8)+isin(pi/8))/(1+cos(pi/8)-s...

`[(1+cos(pi/8)+isin(pi/8))/(1+cos(pi/8)-sin(pi/8))]^8=?`

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The value of [(1+cos(pi/8)+isin(pi/8))/(1+cos(pi/8)-isin(pi/8))]^8 is

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[(1+sin(pi//8)+icos(pi//8))/(1+sin(pi//8)-icospi//8)]^(-8//3)