1] Cho tam giác ABC vuông tại A có AB = 10cm, góc ACB = 40 độ

a) Tính BC ?

b) Kẻ phân giác BD của góc ABC. Tính AD ?

2] sin 36độ - cos 54độ =?

A. 0 B. 1 C. 2 sin 36độ D. 2 cos 54độ

3] Trong 1Δ vuông biết cos α =\(\frac{2}{3}\). Tính tan α ?

A. \(\frac{5}{9}\) B. \(\frac{\sqrt{5}}{3}\) C. \(\frac{\sqrt{5}}{2}\) D. \(\frac{1}{2}\)

chọn đáp án đúng và giải thích

He came to my house while I ............... English yesterday.

A. was learning B. were leaning C. learned D. could drive

1. Likes Laos, Viet nam is a .............. country in Asia.

A. tropics B. tropically C. tropic D. tropical

2. I .............watch the football match on TV last night.

A. wasn't watch B. didn't watch C. doesn't watch D. don't watch

\(\sqrt{5+\sqrt{3}+5\sqrt{48-10\sqrt{7+4\sqrt{3}}}}\)

1) \(\sqrt{28+10\sqrt{3}}-\sqrt{28-10\sqrt{3}}\)

2) \(\frac{3\sqrt{2}-2\sqrt{3}}{\sqrt{3}-\sqrt{2}}\) \(-\frac{5}{1+\sqrt{6}}\)

When did you get up this morning? (out of)

=> When.................................................

" You only think of yourself", she told him

=> She accused......................................................

1. this book is very interesting and so is that one.

=> this book is as.....................................................

2. I last read this book in september

=> I haven't ..........................................

3. Mary began collecting stamps in 2005

=> Mary has been........................................

4. I have never read that book before

=> It's......................................................

Viết lại câu sao cho nghĩa ko thay đổi:

1. it's a good idea for you to write this e-mail

it's high time............................................

2. you shouldn't behave so rudely

I'd rather you.................................

3. you can't mention that in public

You'd better ...................................

4. it's a pity i am not thinner

I wish..............................

5. i can't speak English fluently

If only......................................

6. Why don't you show me your flat?

It's time...........................................

7. My best friends are moving out

If only............................................

8. I want her to tell the truth

I'd rather she...............................

9. If i were you i wouldn't truth him

You'd better.....................................

Viết lại câu sao cho nghĩa ko thay đổi.

1. I want to have a party but my flat isn't big emough

I wish.................................................................................

2. You shouldn't go out, you have to go to svhool tomorrow

You'd better..........................................................................

3. Jane regrets spending all that money on clothes.

Jane wishes...............................................................

4. It's a pity i didn't make it to your wedding

If only.............................................................

5. You'll be late for the concert unless you leave now

If you..........................................................................

6. I would prefer not to invite Sam

I'd rather ......................................

7. Samanta wants to be a model but she is too short

samanta wishes...................................................

8. Fred regrets shouting at his wife

Fred wishes .....................................

9. It's a shame he doesn't know your family

i wish..............................................

10. I want to go on holiday but i can't afford it

If only......................................................