Предмет: Математика, автор: tregalin

В треугольнике АБС угол С равен 90 градусов тангенс А=4 поделить на 3 найдите синус А

Ответы

Автор ответа: theburchik
0
1) тангенс а = ВС/АС
т.о.,BC = 4; AB = 3
2) По теореме Пифагора находим АВ
АВ^2=9+16=25
АВ = 5
3) синус а = ВС/АВ
синус а = 4/5 = 0,8.

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Геометрия, автор: bogdanamalinov
знайдіть координати середини відрізка ав та його довжину якщо а(1;-1;1)в(1;-5;4)
7 лет назад
Предмет: Математика, автор: TheKeylloo
Среднее арифметическое чисел
45,4, 127,08, 90,36 и 100,1 равно =
7 лет назад
Предмет: Английский язык, автор: Kirill240514
Заполните каждый пропуск одним словом, подходящим по смыслу.
Last week I went to an auction held in the village. The items being sold there (1) … very beautiful. I liked a lovely vase very (2) ..., but it was (3) ... expensive that I couldn't (4) ... to buy it.
2. Very often a disagreement between two friends can lead to a permanent problem. In order to avoid falling out with a friend, (1) … is always an excellent idea to try to see the other person’s point of view. If you take into consideration how someone (2) … thinks, your own thinking will improve, so you should write down the views your friend is likely to have. Not (3) … will his or her thoughts surprise you, but you may find a solution to the problem as (4) … .
3. 1) ... of the nicest ways to spend a summer afternoon is to have a picnic. 2) ... is something about eating out of doors that is very special. Of 3) ..., some things are essential if the picnic is going to be an enjoyable experience. The weather has to be sunny; 4) ... many people enjoy eating sandwiches in the pouring rain! The site must be carefully chosen. Then, when the meal is finished, you can just relax in the sunshine, or go for a swim.
4. John Tricky doesn't stop complaining. Yesterday he came to see the hotel manager again and said, “I'd like to point out that (1) ... is no hot water in the showers! (2) ... do you expect me to wash when the water is cold? We're not living in the Middle Ages (3) ... more. I do expect certain basic facilities to be available and hot water is definitely (4) ... of them”.
7 лет назад
Предмет: Обществознание, автор: saigafarovamarina
В каких пословицах и поговорках народ выразил свое отношение к труду,трудолюбию,хозяину дома?Какие пословицы учат разумно вести домашнее хозяйство?
Помогите пожалуйста!
10 лет назад
Предмет: Математика, автор: lilialile
помогите !
почему десять девятых меньше девяти восьмых
10 лет назад