Предмет: Алгебра, автор: анюточкаточка

Очень надо,тригонометрия,
8cos(2arccos3/4)

Ответы

Автор ответа: Аноним
0
8cos(2arccos3/4)=16cos²arccos3/4-1=16(3/4)^2-1=16*9/16-1=9-1=8
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: Аноним
Тест 7 класс
1.Choose the right verbs
How long … you…the book?
A) has, been
B) have, been
C) have, read
D) are, read
E) has, read
2. Answer the question
What is the capital of Great Britain?
A) Ottawa
B) Paris
C) Astana
D) Washington
E) London
3. Choose the right form of plural nouns:
A) Baby
B) Babys
C) Babies
D)Babiys
E) Babyes

4. Find the right verbs:
It ……………for 3 hours already.
A) have been snowing
B) have snow
C) has snow
D) has been snowing
E) snow

5.Find the opposite word:
Polite
A) Interesting
B) Kind
C) Big
D) Patient
E) Rude
6. Answer the question:
What does the traditional British Sunday lunch consist of?
A) Yorkshire pudding
B) Apple cake
C) Milk and toast
D) Bread and butter
E) Bacon and eggs
7. Choose the right modal verb:
I…. get up early on Mondays.
A) Is to
B) may
C) able to
D) have to
E) must

8. Find the right form of the verb:
My brother … at the theatre yesterday.
A) Am
B) Is
C) Are
D) Were
E) Was

9. Choose the right word:
There … a lot of bread on the table.
A)am
B) were
C) are
D) weren’t
E)is

10. Choose the right word:
There was only……butter left.
A) A few
B) A little
C) Many
D) The
E) A

11. Choose the right verb:
My brother … a bread last year.
A) have grown
B) had grown
C)have grew
D) grew
E)grow
12. Find the right word:
Cardiff is the capital of……
A) England
B) Wales
C) Northern Ireland
D) Scotland
E) Britain


13. Choose the verb in the right form:
He ………….back home. Here he is.
A) has come
B) came
C) come
D) have come
E) came
14. Find the right article
She has got… lovely smile.
A) The
B)-
C) An
D) A
E) Any

15. Choose the right word :
There is…. milk in the bottle.
A) few
B) many
C) little
D) an
E) are

16. Choose the right form
New hospital ………..by the Queen.
A) were opened
B) open
C) opening
D) opens
E) was opened

17. Choose the right word:
He did the work……
A) Herself
B) Myself
C) Itself
D) Himself
E) Themselves


18. Choose the right form of the verb:
Bread is … every day.
A) eat
B) eaten
C) eating
D) eats
E) eated
19. Write the right word:
We …going to visit Picture Gallery. We are interested in Kazakh art.
A)is
B) were
C) been
D) are
E) was
20. Write the necessary preposition:
I rely…my friend.
A) at
B) with
C) on
D) –
E) after
6 лет назад
Предмет: Биология, автор: arinasersnova
синквейн на тему дыхание​
6 лет назад
Предмет: Математика, автор: YADAYNTOP1GG
Математика : Сравнить модули чисел : а) -2 и -10 б) 6/7 и -8/7 в) 0,94 и -3 г) -8,1 и 1,8 заранее спасибо​​
6 лет назад
Предмет: Математика, автор: vsorokin530
что бы купить 5 карандашей, мальчику не хватает 4 рубля. он купил 4 карандаша и у него осталось 5 рублей. Сколько стоит один карандаш и сколько денег было у мальчика
9 лет назад
Предмет: Биология, автор: samarina98
Замените выделенные слова в каждом утверждении одним термином: 
Превращение диких животных в домашних путем приручения,содержания и разведения обусловило развитие животноводства как отрасли сельского хозяйства.
Близкородственное скрещивание особей, имеющих общих предков,широко используется в гибридизации животных.
9 лет назад