Предмет: Алгебра, автор: anastasiayayacovleva

Потрібно спростити вираз

Приложения:

Ответы

Автор ответа: lizapodvoiska

$\frac{1}{1+tg^{2}\alpha } =1/ \frac{1}{cos^{2} \alpha } = cos^{2} \alpha$

( $1 + tg^{2} \alpha = \frac{1}{cos^{2} \alpha }$ )

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Математика, автор: sasha123863

777. Розгорнутий кут COD поділено променями ON i OF
так, що ZNOD = 130°, Знайди градусну міру кута NOF.
ПОМОГИТЕ СРОЧНО

1 год назад

Предмет: Алгебра, автор: yolo30

Спростити вираз: ...........................

1 год назад

Предмет: Английский язык, автор: fhjfgh

Task 1. Discuss the questions.
1) Do you eat much fruit or deink much fruit juice? Why? / Why not?
2) What fruits are grown in your country? In what area?
3) Have you ever eaten cranberries? Did you like them?
4) What do you know about where they grow and what the tree / plant is like?
5) How do you think they are harvested?

Task 2. Read the short summary of how the cranberries are harvested. Complete the summary with one or two words in each space.

When the berries ripen in early fall, the growers 1________ the marsh beds. They use machines called 2________ to remove the berries, which then float to the surface and are collected together. They have to keep an eye on 3________ because a hard frost can destroy the crop. When the berries are in danger of 4________, the growers turn on an irrigation system to keep the temperature above 5________ and to produce a bumper crop.6________, dykes and ditches store water to provide an adequate supply at a 7________. Mary thinks the cranberry harvest is not just good for her business but also good for 8________. She sees herself as a mother to both her children and the environment in which she lives.

Task 3. Discuss the questions.
1) In which areas of your country is there most farming? What are the main crops?
2) Have there been any problems or crops in recent years because of the weather? What happened?
3) Do you think farming benefits or damages wildlife in your country? In what ways?

Task 4. Complete the text with one word in each space. Contractions count as one word.

Generally 1________, when I was growing up we had a traditional Sunday lunch. as a 2________, my mum cooked some roast meat like chicken or beef served 3________ some boiled vegetables and a sauce which we call “gravy”. I loved it, but now I live on my own I 4________ ever have a Sunday lunch 5________ I visit my parents. Basically, cooking a roast dinner takes a long time and I’m usually too tired on Sunday as I 6________ to go out till late on Saturday. Maybe if I 7________ cooking for more than one person I 8________ make an effort, but it’s not worth it just for me. Maybe 9________ I ever get married and 10________ my own family, 11________ make them a proper Sunday lunch, but I bet it 12________ taste as good as my mum’s.

1 год назад

Предмет: Геометрия, автор: goncarovamaria331

Докажите, что четырехугольник с вершинами А (1;2), В (4;-1), С(8;3), D(5;6) является прямоугольником.

7 лет назад

Предмет: Музыка, автор: grehovakatia777

помогите правильно решить тест по музыке тема "Мюзикал"

7 лет назад