Prove that: 2cos8A+1=(2cos4A-1)(2cos2A-1)(2 cosA -1)(2cosA+1)

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Prove that 2cos8A+1 0:06:44

Prove that 2cos8A+1 = (2cosA-1)(2cosA+1)(2cos2A-1)(2cos4A-1)

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Prove that: 2cos8A+1=(2cos4A-1)(2cos2A-1)(2 cosA -1)(2cosA+1)

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Prove that:- (2cosA+1)(2cosA-1)(2cos2A-1)(2cos4A-1) = 2cos8A+1

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