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Mathematics, 14.02.2021 17:40 1020lakyn

(2cosa-1)(2cos2a-1)(2cos4a-1)(2cos8 a-1)=2cos16a+1/2cosa+1

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(2cosa-1)(2cos2a-1)(2cos4a-1)(2cos8 a-1)=2cos16a+1/2cosa+1...

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