Предмет: Алгебра, автор: Yarxslav

Укажіть корені рівняння соs(x)=1, які належать інтервалу (-п/2;п/2).

Ответы

Автор ответа: NNNLLL54

$cosx=1\\\\x=2\pi n\; ,\; n\in Z\\\\x\in (-\frac{\pi}{2}\, ;\, \frac{\pi}{2})\; \; \Rightarrow \; \; \boxed {x=0}$

Приложения:

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: Рыба96

Нужно ответить на вопросы!

The British are said to be polite and well-mannered people. Polite words or phrases such as "Please", "Thank you" and "Excuse me" are used very often in Britain. Queuing is a national habit. At bus stops and cinemas, in shops, banks and post offices and in lots of other places you'll have to join the queue and wait for your turn. "An Englishman, even if he is alone, forms an orderly queue of one", said George Mikes. The British are said to be reserved. They don't like displaying their emotions even in dangerous and tragic situations. But they are not un¬emotional. They control their emotions because they are taught that it is best not to show their feelings. The English hardly ever lie, but they don't tell you the truth either. English people take everything with a sense of humour. You can easily offend them if you tell them they have no sense of humour. Englishmen tend to be rather conservative, they love familiar things. They are proud of their traditions and carefully keep them up. Britain has more living symbols of its past than many other countries. Tradi¬tional uniforms are still preserved in Great Britain. There are also a lot of traditional ceremonies such as the "Changing of the Guard" at Buck¬ingham Palace, "Trooping the Colour", which is performed on the Queen's official birthday, or the "Ceremony of the Keys", that takes place every night at the Tower of London. The English are practical and realistic, prudent and careful about al¬most everything. Everything is orderly: the lawns and the trees are neatly trimmed. Every Englishman is said to be a countryman at heart. The Eng¬lish countryside is many things to many people. It means peace and quiet, beauty, good health and no crime. Most Englishmen love gardens. Gar¬dening is one of the most popular hobbies among Englishmen. They usual¬ly prefer a house with a garden to an apartment in a modem block of flats. The British people are considered to be the world's greatest tea drink¬ers. They drink it at meals and between meals. The English tea is usually strong and with milk. The British love animals very much. Millions of families have "bird-tables" in their gardens. Nearly half of the households in Britain keep a least one pet. The English take good care of their pets. They are pet lovers.

1. Are the British polite? Why? 2. Are the British reserved or communicative? Why? 3. Why are British people said to be conservative? 4. What traditional British ceremonies do you know? 5. What are traditional British dishes? What do the British like to drink? 6. Do the British keep everything in order? How can you prove that? 7. Do the British like their couuntryside? 8. What is their attitude yowards animals? 9. Can you describe the British using 3 adjectives? 10. What is your personal attitude towards the British? 11. How different or alike do you think the Russians and the British are?

1 год назад

Предмет: Русский язык, автор: saabino4ka

Найди в тексте или подбери нейтральные синонимы,запиши синонимические ряды.

1. -Не лезь к ней,-поддразнил Гейка Колю,- а то она тебя поколотит.

- Меня?-Коля обиделся.-У неё что? Когти? А у меня - мускулатура.Вот...ручная ,ножная.

2. -Я иду,вижу - старуха девчонку колотит.Я кричу: "Тётенька,бить не по закону!",она говорит: "Коза пропала.Ах,будь ты проклята!"-"Да куда же она пропала?" - "А вон там, в овраге за перелеском,обгрызла мочалу и провалилась,как будто её волки съели!"

1 год назад

Предмет: Русский язык, автор: рампунцель

как разобрать по составу слово пристань

1 год назад

Предмет: Математика, автор: evagrem

упростить и вычислить без мк 1+sin18°/(sin9°+cos9°)²

8 лет назад

Предмет: Алгебра, автор: togi123

Помогите решить!
3а=3√2*1/2

8 лет назад