How can I show A/B = 1 where A= 1+ 4cos(2𝛑/7) and B=4(cos(2𝛑/7))^2 + 8(cos(2𝛑/7))^3?

ted s2018-10-19T17:33:27Z

it doesn't...rather 0.1....just compute cos(2Ο€/7) , call it w....[ 1 + 4 w ] / [ 4 wΒ² + 8 wΒ³ ]

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