Синусы и косинусы
Синусы и косинусы
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![Переход от первобытности к цивилизации. Восход и закат Шумеров - Мировая история [Глава 1]](https://sun9-40.userapi.com/jVGKytOZWWSMeRdejYe_JzNibbQgesOmWufKVg/zct4-i77DJk.jpg)
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