Решите неравенство: 2 cos 4x< -1 - №32542517

Решите неравенство: 2 cos 4x< -1
- Предмет:
  Алгебра
- Автор:
  kaseyhurley
- 5 лет назад

Ответы 1

2 cos 4x< -1
cos4x<
$- \frac{1}{2}$
cos равен -1/2 при
$+ - \frac{\pi}{3} + 2\pi \: n$
где n целое число
$4x < \frac{ + - \pi}{3} + 2\pi \times n \\$
$x < + - \frac{\pi}{12} + \frac{\pi}{2} n$
n - целое число
- Автор:
  braydonbarker
- 5 лет назад
- 0
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