как упростить это выражение ???:) 1:(1+cosa)+1:(1-cosa) - №19720675

как упростить это выражение ???:) 1:(1+cosa)+1:(1-cosa)
- Предмет:
  Математика
- Автор:
  olliejdcl
- 6 лет назад

Ответы 1

1/(1+cosa)+1/(1-cosa)= (1-cosa+1+cosa)/(1-cos²a)=2/sin²a
- Автор:
  jarrett
- 6 лет назад
- 0
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