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Юрьевка
@Юрьевка
August 2021
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Пожалуйста,очень нужно:)Помогите решить..
1.cos18cos12-sin18sin12/2sin^2 15градусов
2.4sin^2 3альфаcos^2 / альфа/(2cos^2 3 альфа-1)^2 - cos(п-альфа)/cos альфа
3.10сos(2arctg1/3)=?
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