Dựng góc nhọn α biết:

a) tanα=\(\dfrac{3}{4}\)

b) sinα=0,5

c) cosα=\(\dfrac{2}{5}\)

d) cotα=3

Biết sin48⁰\(\approx\)0,7431.Tính sin42⁰

Tính:

A=\(\dfrac{1}{5+2\sqrt{6}}-\dfrac{1}{5-2\sqrt{6}}\)

B=\(\dfrac{1}{\sqrt{3}+2}-\dfrac{1}{\sqrt{3}-2}\)

C=\(\dfrac{3}{\sqrt{3}}+\dfrac{2\sqrt{3}}{\sqrt{3}+1}\)

D=\(\dfrac{\sqrt{15}-\sqrt{12}}{\sqrt{5}-2}-\dfrac{1}{2-\sqrt{3}}\)

Trục căn thức ở mẫu:

a) 14/2√3-√5

b) x²-y/x-√y

Cho hình chữ nhật ABCD từ D hạ đường vuông góc với AC, cắt AC ở H biết rằng AB=13cm DH=5cm.Tính độ dài BD

Cho tam giác ABC vuông ở A có BC=10cm.Đường phân giác góc A chia cạnh huyền thành hai đoạn theo tỉ số 3/4

a) Tính AB.AC

b) Kẻ AH vuông BC tại H.Tính AH

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 43 to 47.

THE GENERATION GAP

People talk about the generation gap as a kind of division between young people and their parents. It is something which is generally a problem when children enter their teenage years, and results (43)______ complaints on both side. Parents, for example, can often be heard to say that young people are (44)______ and disobedient and in addition tend to be irresponsible when spending because they don’t appreciate the (45)______ of money. Adolescents, on the other hand, complain that their parents don’t understand them.

What has gone wrong? One explanation lies in (46) ______society has changed. In the past, children would typically continue the way of life of their parents. In today’s world, parents are very (47) ______ for their children because they want them to achieve more than they did. The problem is that the children often don’t agree with their parents’ plans. Teenagers also reach maturity at an earlier age than they used to and want their independence sooner. The resulting conflict is painful to both sides. Adapted form Mastering Use of English.

Điền vào ô 43.

A. in

B. on

C. to

D. of

Quy đồng mẫu số các phân số sau:

a)  11 120 ; 7 40

b)  − 2 9 ; 4 25

Something tells me that you _______ to a single word I _______ in the past ten minutes.

A. haven’t listened/ was saying

B. didn’t listen/ said

C. haven’t been listening/ have said

D. haven’t listened/ said

Lien and Loan are planning for their weekend.

Lien: “_______”

Loan: “Not really.”

A. I don’t like that new movie

B. Would you like to watch a cartoon or a documentary?

C. Would you recommend the new movie at the Odeon?

D. How often do you go to the movies?