Предмет: Математика, автор: ssevda2005

Реши управление (600°;680°)
1 + \cos6x = 4 \cos ^{2} 3x
​

Приложения:

Ответы

Автор ответа: semavolokh
1

Ответ: 630

Пошаговое объяснение:

1+cos6x = 4cos^23x\\1 + cos6x = 2+2cos6x\\cos6x = -1\\6x = \pi +2\pi n\\x = \frac{\pi }{6} + \frac{\pi n}{3}

x = 30 + 60n, при n = 9 x = 570, при n = 11 x = 690. Тогда нужный ответ будет при n = 10, x = 630

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