Вычислить sin 765 градусов ... Вычислить соs 19п/6 - №10194039

Вычислить sin 765 градусов ...
Вычислить соs 19п/6
- Предмет:
  Алгебра
- Автор:
  arnaldo
- 6 лет назад

Ответы 1

1) sin 765=sin(720+45)=sin(4π+45)=sin 45=√2/22) cos (19π/6)=cos(18/6π+π/6)=cos (3π+π/6)=cos (2π+π+π/6)=cos(π+π/6)=-cosπ/6=-√3/2
- Автор:
  alisonbdjf
- 6 лет назад
- 0
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