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-2,36+18-7,64=18-(2.36+7.64)=18-10=8
Решение смотри на фотографии
Sin17π/6 = Sin((3π- π/6) = -Sinπ/6 = -1/2
Cos240° = Cos(270° - 30°) = - Sin30° = -1/2
сам пример: -1/2 =1/2 = -1
Ответ:
x1 = 5184
x2 = -5184