2tg(a)/(1+tg^2(a))*2cos^2(a) - №22164369

2tg(a)/(1+tg^2(a))*2cos^2(a)
- Предмет:
  Алгебра
- Автор:
  samsonjoyce
- 6 лет назад

Ответы 1

1+tg²L=sec²Lsec²L * 2cos²L=2sec²L*cos²L=22tgL/2=tgL
- Автор:
  phoenix
- 6 лет назад
- 0
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