если cos2x=1/4, найдите sinx^{2}2x ? - №23509627

если cos2x=1/4, найдите sinx^{2}2x ?
- Предмет:
  Алгебра
- Автор:
  taylor39
- 5 лет назад

Ответы 1

sin2x=√(1-cos²2x)=√(1-1/16)=+-√15/4sin²2x=15/16
- Автор:
  zacharyozib
- 5 лет назад
- 0
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