Предмет: Геометрия, автор: KateMosi6958

Образующая конуса равна m и образует с высотой конуса угол a. Найти площадь боковой поверхности и объем конуса

Ответы

Автор ответа: fenix6810

Sб=ПRL

R=L*sina

Sб=Пm²sina

V=(1/3)ПR^2h

h=Lcosa

V=(1/3)ПL³sin²acosa=(П/6)m³sinasin2a

ответ

V=(П/6)m³sinasin2a

Sб=Пm²sina

jjjjh4jdjkdiridi: Разделите круг четырех диаметров на равные части. Сколько градусов составляет один угол? Как называются углы?

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: juliaivanova19

помогите..!!можно перевод текста . очень срочнооо.за ранее большое спасибо)
Electromagnetic Relay
Electromagnetic devices called relays are widely used in various
branches of industry.
The main parts of а relay are an electromagnet, а spring and аn ar
mature. When а current starts flowing in the electromagnet winding, the
armature moves and the spring closes the contacts. The primary circuit
of а relay is its electromagnet circuit and the secondary circuit is the
оne closed bу the contacts.
When there is по current in the relay's primary circuit, the spring
puHs the armature and the contacts оpen.
Fig. 18 shows how а relay is used to control the work of an electric
motor. The relay is placed close to the motor which is connected to its
secondary circuit. The armature closes the contacts of the secondary
circuit, and the motor starts operating; it will stop when the relay opens.
Without а relay, conductors with а large crosssection would have to
be brought to the motor. This would be very uneconomical. The current in а relay is tens and even thousands of times smaller than that used to
power the motor. Therefore, the connecting wires сan have small cross
sections.

1 год назад

Предмет: Английский язык, автор: Еркежаныыым

1. My sister .... a shower every morning. Take 2. John .... milk twice a day. Drink 3. He .... breakfast at 8 o'clock every day. have 4. What time ____ you start work? Do 5. Susie ______________ shopping in Causeway Bay.ing. love 6. Now I … in the club. And what about you? What are you doing? dance 7. Listen! Somebody … to break into our house! Call the police immediately. Try 8. Don’t talk so loudly. Our son … in his room. Study 9. Where _____ on holidays? Go 10. In Britain people _____ on the right. drive 11. Last year Bill ____ to become a pilot. This year he wants to be a doctor or a writer. Want 12. Where _____ you last week? Did you attend the lectures on history or did you play truant? Be 13. Her son ____ the window, therefore we must buy the other windowpane. Break 14. John was so thirsty that he ___ two glasses of water. Drink 15. We ___ last night due to the nasty weather. Go out 16. A: _____ did she _____ a job? get B: In the car factory. 17. Max didn’t _____ yesterday afternoon; he _____ at home. Go out/ stay 18. A: _____ you _____ Jane last month? see B: No, I _____ . a. While we _____ a drink, a waiter _____ a pile of plates. Drop 19. While I _____ this morning, I _____ my money. I don’t know how. Shop/lose 20. Geoffrey _____ French before, but he _____ at university now. Study/ 21. Is it the second time you … Russia? No, I … Russia four or five times. 22. … you … my letter from the USA yet? I … it to you a week ago. Receive /send 23. ... you ... the newspaper today? Read 24. He can’t find a job. He ______ unemployed for half a year. 25. “I ______ the letter you asked about, sir,” said the butler. bring 26. ... you still ... ... at six o'clock? Work 27. "Когда я вернусь, они будут ужинать". 28. "I will be reading a book at five o'clock". 29. "Если он будет спать, когда вы придете, разбудите его". 30. What ... you ... ... when he comes? Do 31. This time next month I (to climb) the mountain or (to swim) at the sea. 32. I think I ... this piece of cake. It looks delicious! take 33. You don’t have to call Cindy. I ... her later, so I’ll pass the message on. see 34. This time next week, we ... round the islands. Cruise 35. I spend most of my time in my bedroom which I use ... a study. 36. Не ______at me as if I had asked him to do something impossible.( syn with Look) 37. He's very fond of this picture, he can ______at it for hours. syn with Look) 39. I looked _____, but saw no people anywhere. Preposition 40. The two brothers differ ___their tastes. Preposition 41. Не _________ for an hour before going on with his work. Put appropriate words 42. The other day I _____a very interesting article in the newspaper. Put appropriate words 43. give synonym : to shiver 44. I cannot see much _____between the twins. Put appropriate words 45. Transcribe the following words: parliamentary 46. Transcribe the following words: magnificent 47. Transcribe the following words: photography 48. Transcribe the following words: circulation 49. translate into English: Докладчик говорил о будущем человечества 50. translate into English: Поверьте мне, этот молодой человек достоин вашего уважения. 51. Теперь в Англии в обращении фунты и пенсы 52. Предельная скорость в жилых районах Москвы 60 км/час. 53. Богатая коллекция произведений изобразительного и прикладного искусства привлекает посетителей этого музея. 54. Каждая английская газета имеет определенный круг читателей. 55. Сотни новых домов вырастают во всех городах нашей страны.

1 год назад

Предмет: Английский язык, автор: Хана16

Напишите три формы глаголов:
arrive have wash leave
get watch go dress

И составьте предложение с некоторыми из них на тему "Ваше (моё) Вчерашнее Утро"

ПОМОГИТЕ ПОЖАЛУЙСТА!!! НУЖНО СРОЧНО СДЕЛАТЬ!!!

1 год назад

Предмет: Математика, автор: mark200966

Помогите решить задачу

7 лет назад

Предмет: Литература, автор: vladimirkondratev

Почему Герасима уважали дворовые?
Из рассказы "Муму"
Плиз ответьте, буду благодарен.

7 лет назад