Заменить на произведение а) sinx+sin7x б) cos16y-cos4y - №9615604

Заменить на произведение
а) sinx+sin7x
б) cos16y-cos4y
- Предмет:
  Математика
- Автор:
  jellynv7n
- 6 лет назад

Ответы 1

$sinx+sin7x=2sin4x\cdot cos3x\\\\\\cos16y-cos4y=-2sin6x\cdot sin5y$
- Автор:
  otto
- 6 лет назад
- 0
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