Найдите tg²a, ели 3sin²a+9cos²a=8 - Дата: 23.10.2019, Автор: corbinwalters - №21111295

Найдите tg²a, ели 3sin²a+9cos²a=8
- Предмет:
  Математика
- Автор:
  corbinwalters
- 6 лет назад

Ответы 1

tg^2(a)= 1/5 = 0.21) Группируем 3*cos²a c 3sin²a в 3*1=32) Выражаем 6*cos²a = 5.3) Подставляем в tg²a = sin²a/cos²a.
- Автор:
  lincolnperkins
- 6 лет назад
- 0
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