Áp dụng định lí Pytago vào tam giacs ABC có

BC = 5

Cos acb= \(\dfrac{AC}{BC}\)= 53 độ

( BÀI NÀY MỚI ĐÚNG< NÃY MÌNH NHẦM AB BẰnG 2

6.   her bad grades, she failed the University entrance exam

7.   having a physical handicap, he has become a successful businessman

8.   the price is cheap, my wife insists on buying the TV

9.   the heavy rain, she still went to school

10.   studying hard, I passed the exam

(Tự vẽ hình nhé )

Áp dụng dụng định lí Pytagov vào tam giác ABC vuông tại A có:

\(AB^2+AC^2=BC^2\)

⇔ BC = 2√5

\(\cos ACB\) = \(\dfrac{4}{2\sqrt{5}}\) = 26 độ

1.  Many doctors say that teenagers undergo many physical and mental changed during their puberty

2.   Sometimes my mother tells me that I didn’t have to be so tense

3.   Peter said that he was looking forward to his grandfather’s gift

4.   Peter said that if he passed that test, his father would buy him a new skateboard

5.   I told my teacher that I had forgotten to do my homework

6.   Jim said that Mr. Brown owned 2 cars and 3 houses

7 .  She said to me that she couldn’t do it by herself

1 In spite of not being an intelligent student, he can learn very fast

2 Hoa's richness, she could buy that house

3 the heavy rain, I couldn't go to school

4 his sickness, his father asked him to stay at home

5 Because of an accident, I was late

amazing :>>, chào bạn

amazing:>