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Whithoutme
@Whithoutme
August 2022
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Вычислие пожалуйста: ctg2альфа-ctgальфа
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araizhursinbek
ctg^2a-1/2ctga-ctga=ctg^2a-1-2ctga/2ctga=cos^2a/sin^2a-1-cosa/sina/2cosa/sina=(cosa-sin)^2/sin^a÷2cosa/sina=(cosa-sina)^2/2cosa×sina
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