Các hàm số dưới đây có là hàm số chẵn hay hàm số lẻ không?

a) y = 5sin²x + 1;

Có bao nhiêu giá trị x trên đoạn [–2π; 2π] thỏa mãn điều kiện tanx = 2?  

Li độ s(cm) của một con lắc đồng hồ theo thời gian t (giây) được cho bởi hàm số s = 2cosπt. Dựa vào đồ thị của hàm số côsin, hãy xác định ở các thời điểm t nào trong 1 giây đầu thì li độ s nằm trong đoạn [– 1; 1] (cm).

You have spent too many time on that homework.

A. spent

B. too

C. many

D. on

“Please turn up the radio, I can’t concentrate on my work”

A. turn up

B. the

C. can't

D. on

Hoàn thành bảng giá trị sau đây và xác định các điểm tương ứng trên mặt phẳng tọa độ.

The men are able work better than they did last year.

A. The men

B. able work

C. better

D. did

Ann and Susan have known each other during they were at school.

A. and

B. each other

C. during

D. were

My best friend, that we see every day, always has something new to tell me.

A. best friend

A. best friend

C. has

D. something new

According to the text, women in the 21st century ________.

A. do not have to do housework any more

B. are still the victims of family violence in some rural areas

C. get help from their husbands with all housework

D. spend less than 12 hours working outside the home and doing housework

A. have been eradicated completely

B. disappeared soon after the women's liberation movement

C. still exist at present

D. was forced to change after the women's liberation movement

What did women have to suffer?

A. Good schooling

B. Choosing a husband themselves

C. Enjoy their housework

D. Illiteracy

Years ago, women are not allowed ________.

A. to work in the kitchen

B. to go to school

C. to do housework

D. to stay at home with their parents

Which is not women's role in the former days?

A. Working in authority

B. Doing housework

C. Doing cooking

D. Bearing and rearing children

English has become the main language of.........................

A. communication

B. communicating

C. communicator

D. communicative

She is not really friendly. She does not get on well ..................... her classmates.

A. on

B. from

C. for

D. with

They were late for work because their car ....................... down.

A. broke

B. wnet

C. got

D. took

I have nearly finished reading the book. There are only a few ................. left.

A. pages

B. slices

C. sheets

D. pieces

Xét tính tuần hoàn của hàm số y = cosx và hàm số y = cotx.

We were really....................with the weather.

A. disappointed

B. disappoint

C. disappointment

D. disappointing

Hãy chỉ ra một số thực T sao cho sin(x + T) = sinx với mọi x ∈ℝ.

The river ........................we get our water- supply is nearly empty.

A. from which

B. where

C. which

D. that

Anne: “Thanks for the nice gift!”    - John: “..........................”

A. I’m glad you like it

B. But do you know how much it costs

C. In fact, I myself don’t like it

D. You’re welcome

Chứng minh rằng hàm số y = sinx và hàm số y = cotx là các hàm số lẻ.

“It was very cold yesterday. The winter is just around the corner. “I think today will be …………… yesterday.”

A. so cold as

B. as cold as

C. cold as

D. so as cold

A: "Would you like me to get it for you?"               B: " ......................."

A. I’m glad to

B. Me, too

C. No problem

D. Don’t bother

The Vietnamese Women’s Football team ....................defended the SEA Games Champion title.

A. successfully

B. success

C. successful

D. succeed

Xét hai hàm số y = x², y = 2x và đồ thị của chúng trong Hình 2. Đối với mỗi trường hợp nêu mối liên hệ của giá trị hàm số tại 1 và – 1, 2 và – 2. Nhận xét về tính đối xứng của mỗi đồ thị hàm số.

He is disappointed at not being offered the job, but I think he will .................... it.

A. take in

B. get away

C. take after

D. get over

It looks like they're going to succeed .......................their present difficulties.

A. although

B. despite

C. because of

D. but

They spoke .............. for us to understand.

A. too slow

B. slowly enough

C. slow enough

D. so slow

b) Giá trị tant (nếu  $t\ne \frac{\pi }{2}+k\pi ,k\in \mathbb{Z}$) và cost (nếu  $t\ne k\pi ,k\in \mathbb{Z}$).

……….he was sick, he still turned up for his guitar lesson.

A. Because

B. Although

C. If

D. Since

Tom said that he ......................his motorbike the day before.

A. had lost

B. has lost

C. lose

D. lost

My mother suggested …….......................

A. being gone to the countryside this weekend

B. to go to the countryside this weekend

C. go to the countryside this weekend

D. going to the countryside this weekend

........................, " you'll probably get poor marks in the final exam.

A. Although your marks on the tests are not very good

B. Because you're making efforts in your studies

C. Unless you pay more attention to your work

D. If you try to work harder

Cho số thực t và M là điểm biểu diễn của góc lượng giác có số đo t rad trên đường tròn lượng giác, hãy giải thích vì sao xác định duy nhất:

a) Giá trị sint và cost;

Mary will have finished all her work ………………….

A. until her boss will return

B. as soon as her boss returned

C. by the time her boss returns

D. when her boss will return

Trong các biểu thức sau, biểu thức nào là đa thức?

−x³ + 3x + 1;  $\frac{x}{\sqrt{5}};$  $x-\frac{\sqrt{5}}{x};$ 2024; 3x²y² – 5x³y + 2,4;  $\frac{1}{x^2+x+1}.$

...................... he drank, ........................he became.

A. The most / the most violent

B. The less / less violent

C. The more / the more violent

D. More / more violent