в треугольнике ABC угол C равен 90 градусов sinA =0,5 найдите cosB - №5913539

в треугольнике ABC угол C равен 90 градусов sinA =0,5 найдите cosB
- Предмет:
  Геометрия
- Автор:
  diegogomez
- 5 лет назад

Ответы 1

cosb=cos(90-a)=sina=0.55
- Автор:
  eva36
- 5 лет назад
- 0
Добавить свой ответ

Еще вопросы

Петя сначала прочитал 55 слов за 1 минуту, в другой раз 59 слов в минуту, а в третий 66 слов в минуту. Каково среднее количество прочитанных слов?
- Предмет:
  Алгебра
- Автор:
  brunopowell
- 5 лет назад
- Ответов:
  
  1
- Смотреть
Из одной точки одновременно в разные стороны выехали два велосипедиста .Скорость первого велосипедиста 240м/мин , а скорость второго 360м/мин . на сколько километров они удалятся друг от друга через 1 час
- Предмет:
  Математика
- Автор:
  joeyvelasquez
- 5 лет назад
- Ответов:
  
  2
- Смотреть
Ответить на вопросы по этому тексту:

Hyde Park
It's the London's largest and most fashionable park. It was once a
royal hunting forest. There are restaurants and bars at each end of the
Serpentine lake. Hire a boat.
Downing Street
Number 10, Downing Street has been the home of the British Prime Minister since 1735.
The Houses of Parliament
Its official name is the Palace of Westminster. Most of the building
was built in 1840 after the fire of 1834 destroyed the old palace. At
the north end of the building, by Westminster Bridge, there is the
famous clock tower, Big Ben. In fact Big Ben is really the name of the
bell in the tower, not of the clock.
The Tower of London
It's the London's oldest building. Since it was built by William the
Conqueror in the 11th century, this castle has been a Royal palace, a
prison, a place of execution, a zoo, the Royal Mint, and an observatory.
Today it's a museum and houses the Crown Jewels. There is a gift shop.
The Natural Museum
It's situated in Kensington and is one of London's greatest museums.
There is a huge collection of animals and plants, including a quarter of
a million butterflies, a blue whale and the famous dinosaur skeletons.
There is a cafeteria, a gift shop, and a book shop.
Madame Tussauds, Morylebone Road
The famous Waxworks Museum has the models of famous people from pop
stars to prime ministers, displays of battles and a Chamber of Horror.
The Royal Observatory, Greenwich
It is situated 10 miles outside London on a hill above the River
Thames. The Observatory contains telescopes and displays about
astronomy, including Halley's Comet and Black Holes. There is a video
theatre and a souvenir shop. Picnic in Greenwich Park. You can take a
river boat to Greenwich from Westminster Bridge.
Questions:

1. What is the
London's largest and most fashionable park?

2. What street has been the home of the British Prime Minister
since 1735?

3. What is one of London's greatest museums?

4. Where can you see the famous waxworks?

5. Where is the Royal Observatory situated?
- Предмет:
  Английский язык
- Автор:
  schultz46
- 5 лет назад
- Ответов:
  
  1
- Смотреть
Дано слово " заманчивые".
Как проверить букву "И"?
- Предмет:
  Русский язык
- Автор:
  annie36
- 5 лет назад
- Ответов:
  
  2
- Смотреть

How much to ban the user?

1 hour 1 day 100 years