Предмет: Геометрия, автор: sofiiavaleshynska

У трикутнику АВС відомо, що АС=2 см, ВС= 1см, ㄥВ=45°. Знайдіть кут А.

Ответы

Автор ответа: Пеппер

2

Ответ:

21°

Объяснение:

За теоремою синусів sinB/AC = sinA/BC

sinA=sinB*ВС:АС=√2/2 * 1 : 2 = √2/4 = 0,3535

∠А=21°

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Химия, автор: dmitrigotovsii

допоможіть будь ласка 16 завдання

11 месяцев назад

Предмет: Английский язык, автор: kzhdhgdxjxbxnd929937

*************** Toolenouch Complete the sentences using TOO or ENOUGH and the words on the right. Match to the pictures. 1- Mike didn't go to work yesterday. He didn't feel 2- They are only 15. They're married!! 3- The man couldn't concentrate on his work. The baby next to him was 4- My cousin decided to leave the army. He wasn't to be a soldier. 5-Brian couldn't reach the cookies on top of the cupboard. They were 6- Mary tried to drink her coffee but it was 7- David wanted to do weight training but he couldn't. He wasn't. 8- Those babies can't talk or walk properly. They aren't 9- Dad wanted to finish his work before going to bed but he couldn't. He was to get 10- Mr. Jones ran in the marathon but he didn't win. He wasn't 11- Uncle Phil went on a diet and he's lost weight. Now his trousers are for him. 12- Mum couldn't keep her umbrella open this morning. It was 13- Rob didn't go to the cinema with his friends. He didn't have 14- Sarah stayed at home and did the housework. She couldn't watch TV. She was 15- It's nearly 3 o'clock. John is nervous because he hasn't got 16. James goes cycling on Sundays. The doctor says he must lose weight because he's to finish his test. 17- The boy knew he was going to fall his exam. He didn't study 18- There wasn't, in the car for all their luggage. 19- Samuel wants to play with the basketball team but he can't because he isn't wadente 20- The man was shouting and we couldn't talk to him. He was with us. 21- The little girl couldn't go for a walk. Her Clothes were and she needed a bath. C 22- Mark couldn't sleep last night. He watched a horror film and then he was 90

11 месяцев назад

Предмет: Литература, автор: kapenkamila06

выписать из текста только Предложения с однородными членами ,определить их синтаксическую роль построить схему каждого предложения.
Осень
осень пришла и владела садами лесами полями и птицами и всё сразу стало осенним высоту бегали синицы и искали еду они в беседеле вниз головой на ветках и заглядывали в окно днём и ночью ночью все листопад Листья падали днём и ночью и ветер бросал их на стол на пол на книге мы находили листья в кармана в кепке в волосах на дорожках лежали жёлтые и Красные листья мы их мы ходили по листья как по глубокому снегу.

11 месяцев назад

Предмет: Алгебра, автор: viktorialukianenko6

розвьяжите ревняня х²-5х+4=0

6 лет назад

Предмет: Физика, автор: ivanbeelysh

помогите риррррррррррррррррррррррр

6 лет назад