В треугольнике АВС угол С равен 90 градусов , СН-высота ,АС=5 , АН=3. Найдите cosB. - №5096743

В треугольнике АВС угол С равен 90 градусов , СН-высота ,АС=5 , АН=3. Найдите cosB.
- Предмет:
  Алгебра
- Автор:
  mareli
- 5 лет назад

Ответы 1

почитай правило. там все сказано
- Автор:
  sharonwiggins
- 5 лет назад
- 0
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In recent years, the sport has become
more popular. In our city as more and more people prefer to sport than bad
habits. Many people attend a fitness center and swimming pool.
Someone engaged in running, riding a bicycle. In winter, most people seek in
the woods to go skiing. And go skating at the stadium. Since winter is long in
the Urals, so skiing and skating are the most popular in our city.

Sport does very good and useful. In
the first place, because the sport is our life, it helps us not just sit and
move and live. We spend a lot of time in front of computer and TV, we
go on transport. So I think that should do sports everything from the smallest
to the elderly. Sports and improves health mood. This is an activity that
occupies your free time; as well you can meet new people.

Sport for me is all life, luck and
everything else I do only volleyball. And as I prefer winter skate.
- Предмет:
  Английский язык
- Автор:
  louisgtwg
- 5 лет назад
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укажите площадь прямоугольника со сторонами 7дм и 11дм
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Помогите пожалуйста!!!
Сравните употребление

Present
Continuous, Present Simple,

Past Simple и Future
Simple

Упр. 183. Раскройте скобки, употребляя глаголы в одном из следующих времен: Present Continuous, Present Simple, Past Simple или Future Simple.

1. He (to spend) last summer in
the country. 2. He (not to spend) last
summer in the country. 3. He (to spend) last summer in the country? 4.
Where he (to spend) last summer? 5. She (to help) mother yesterday. 6.
She (not to help) mother yesterday. 7. She (to help) mother yesterday? 8. How
she (to help) mother yesterday? 9. Kate (to cook) dinner every day. 10. Kate
(to cook) dinner tomorrow. 11. Kate (to cook) dinner now. 12. Kate (to cook)
dinner yesterday. 13. I (not to eat) ice-cream every day. 14. I (not to eat)
ice-cream now, 15. I (not to eat) ice-cream tomorrow. 16. I (not to eat)
ice-cream yesterday. 17. You (to go) to school every day? 18. You (to go) to
school now? 19. You| (to go) to the south next summer? 20. You (to go) abroad
last summer? 21. What your brother (to do) every day? 22. What your brother (to
do) now? 23. What your brother (to do) tomorrow? 24. What
your brother (to do) yesterday?

Упр. 184. Раскройте скобки, употребляя глаголы в одном из следующих времен: Present Continuous, Present Simple, Past Simple или Future Simple.

1. Mother (to cook) a very tasty
dinner yesterday. 2. Tomorrow Nick (not to go) to school. 3. Look! My friends (to
play) football. 4, Kate (not to write) letters every day. 5. You (to see) your
friend yesterday? 6, Your father (to go) on a business trip last month? 7.
What Nick (to do) yester-1 day? 8. When Nick (to get) up every
morning? 9, Where your mother (to go) tomorrow? 10. I (to invite) my friends to
come to my place tomorrow. 11. He (not to play) the piano tomorrow. 12. We (to
see) a very good film last Sunday. 13. Your [mother (to cook) every day? 14. We
(to make) a [fire last summer. 15. I (to spend) last summer at the sea-side.
16. Where you (to spend) last summer? 17. Where he (to spend) next summer? !
18. What mother (to do) now? — She (to cook) dinner. 19. I (not to play)
computer games yesterday. 20. Last Sunday we (to go) to the theatre. 21. I (to
(meet) my friend yesterday. 22. I (to write) a letter [to my cousin yesterday.
23, You (to write) a dictation tomorrow? 24. I (not to write) a report now.

Упр. 185. Раскройте скобки, употребляя гла-голы в одном из следующих времен: Present Continuous, Present Simple,
Past Simple или Future Simple.

1. We
(to go) on a tramp last Sunday. 2. Your brother (to go) to the country with us
next Sunday? 3. Granny (not to cook) dinner now. 4. We (to cook) our meals on a
fire last summer. 5. My sister (to wash) the dishes every morning. 6. When you
(to go) to school? 7. What you (to
prepare) for breakfast tomorrow? 8. You (to invite) your cousin to stay with you next summer? 9. How you (to
help) your sister last summer? 10. I (to
send) a letter to my friend tomorrow.
11. Every morning on the way to school I
(to meet) my friends. 12. My friend (to go) to the library every Wednesday. 13.
He (not to go) to the country yesterday. 14. Why you (to go) to the shop
yesterday? 15. We (to grow) tomatoes next summer. 16. What you (to do) now? 17.
He (to sleep) now. 18. Where your father (to work) last year? 19. You (to go)
to the south next summer! 20. He (not to watch) TV yesterday. 21.
Yesterday we (to write) a test-paper.
22. 1 (to buy) a very good book last
Tuesday. 23. My granny (not to buy) bread
yesterday. 24. What you (to buy) at the shop tomorrow? 25. Don't make noise!
Father (to work).
- Предмет:
  Английский язык
- Автор:
  kingbouq
- 5 лет назад
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Аналіз вірша( тема, ідея, основна думка, римування, жанр) Ліни Костенко "Українське альфреско"
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- 5 лет назад
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