Предмет: Геометрия, автор: maximov98

Геометрия 8 класс помогите.12 пунктов

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Автор ответа: Светололо

75) синус альфа=b/c, b((катет)=sin альфа*с=6, второй острый угол=90-30=60, косинус альфа=а/с, а(катет)=cos альфа*с=6 корней из 3

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