Значение выражения arccos((-V3)/2)+2 - №29286741

Значение выражения arccos((-V3)/2)+2
- Предмет:
  Математика
- Автор:
  fury
- 5 лет назад

Ответы 2

Спасибо)
- Автор:
  cristal
- 5 лет назад
- 0
$\arccos(-\frac{ \sqrt{3}}{2} )+2= \frac{5\pi}{6} +2$
- Автор:
  gauge
- 5 лет назад
- 0
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Как правильно?

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She said she wouldn't refuse if he would ask her to go to the cinema.
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1. Расставьте коэффициенты в уравнении реакции:
NaHCO3 --> Na2Co3+Co2+H2O
В ответе напишите сумму всех коэффициентов

2. Расставьте коэффициенты в уравнении реакции:
H2+O2--> H2O

в ответе запишите коэффициент при О2

3. Расставьте коэффициенты в уравнении реакции:
Li+O2--> Li2O

в ответе запишите коэффициент при Li

4. Расставьте коэффициенты в уравнении реакции:
K+O2--> K2O
в ответе запишите коэффициент при K2O

5. Расставьте коэффициенты в уравнении реакции:
Ba+H2O--> Ba(OH)2+H2

в ответе запишите коэффициент при H2O
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Решите уравнением или системой уравнений
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