Предмет: Математика, автор: plkhvcvb

Помогите очень нужна помощь!

Приложения:

Ответы

Автор ответа: alanik1
0
Кратко:

Теорема косинусов => ACO - равносторонний со стороной R.

По теоереме Пифагора находим:

R = sqrt{12}

Площадь ABC = (AC*BC)/2.
Площадь BCO = площадь ABC - площадь ACO.

Подставляем R и получаем:

S_{<strong></strong>ACO} = 3 cdot  sqrt{3}

S_{BCO} = 3 cdot(sqrt{12} - sqrt{3})

Подробности:

http://latexpad.clrnd.com.ar/#67cadab19b292b99f57f2b6930a55925


Автор ответа: alanik1
0
не косинусов! Конечно же теорема синусов: AC/sin(30 градусов) = 2*R
Похожие вопросы
Предмет: История, автор: p26350503
Предмет: Английский язык, автор: popitsimpldimpl48
1. Where ______ he live?
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
2. This _____ my dog.
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
3. He must _______ very tired.
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
4. I ____ not like tea.
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
5. I _____ a student.
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
6. When _____ Bryan got his new console?
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
7. Jaime and I ______ best friends.
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
8. ______ you all right?
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
9. ______ you have a blue car?
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
10. What do you usually ______ for breakfast?
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
11. Does he usually ______ a shower or a bath?
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
12. London _____ the capital of Great Britain.
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
13. She could _______ busy now.
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
14. I _______ at the beach with my family.
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
15. The library ____ open until 9:00 p.m.
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
16. What _____ he do?
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
17. ________ you speak Italian?
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
18. It is really a good party. We _____ a great time.
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
19. Sorry! ______ we late?
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
20. How much ____ this cost?
a) be; b) am; c) is; d) are; e) do; f) does; g) has; h) have
Дам 20 баллов