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

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  1. Mr. Bidur Bastola
  2. Prove that:- (2cosA 1)(2cosA-1)(2cos2A-1)(2cos4A-1) = 2cos8A 1
  3. Mr. Bidur Bastola
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