Найдите значение sina, если известно, что cosa=3/5 и 3/2п<а<2п - №12714722

Найдите значение sina, если известно, что cosa=3/5 и 3/2п<а<2п
- Предмет:
  Алгебра
- Автор:
  josiahgutierrez
- 6 лет назад

Ответы 1

sina=-√(1-cos²a)=-√(1-9/25)=-√(16/25)=-4/5
- Автор:
  lassie
- 6 лет назад
- 0
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