September 2021 1 7 Report
ПРОШУ ВАС ПОМОГИТЕ!!!!!!!!!!!!!!!!!!!!!!!
1. Найдите значение выражения cos 30 ° + cos 40 ° + cos 50 ° + ... + cos 150 °.
А) 1

Б) 0

В) невозможно определить

Г) √3/2

2.
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