là lùn

lùn nha 

Vui lòng không đăng bài thi !!!

d

4b.

\(\dfrac{\pi}{2}< a< \pi\Rightarrow cosa< 0\Rightarrow cosa=-\sqrt{1-sin^2a}=-\dfrac{4}{5}\)

\(\Rightarrow tana=\dfrac{sina}{cosa}=-\dfrac{3}{4}\)

\(tan\left(a+\dfrac{\pi}{3}\right)=\dfrac{tana+tan\left(\dfrac{\pi}{3}\right)}{1-tana.tan\left(\dfrac{\pi}{3}\right)}=\dfrac{-\dfrac{3}{4}+\sqrt{3}}{1-\left(-\dfrac{3}{4}\right).\sqrt{3}}=...\)

c.

\(\dfrac{3\pi}{2}< a< 2\pi\Rightarrow cosa>0\Rightarrow cosa=\sqrt{1-sin^2a}=\dfrac{5}{13}\)

\(cos\left(\dfrac{\pi}{3}-a\right)=cos\left(\dfrac{\pi}{3}\right).cosa+sin\left(\dfrac{\pi}{3}\right).sina=\dfrac{1}{2}.\dfrac{5}{13}+\left(-\dfrac{12}{13}\right).\dfrac{\sqrt{3}}{2}=...\)

C.

C

C

Chiều rộng là :18:3=6(cm)

Chu vi HCN là: (18+6)×2=48(cm)

Diện tích HCN là:18×6=108(cm2)

Đ/S:48cm

        108cm2

Làm theo cách này 😆😆

Chiều rộng là : 18.1/3=6(cm)

Chu vi là : (18+6).2=48(cm)

Diện tích là : 18.6=108(cm2)

Đ/S: chu vi : 48 cm

        diện tích : 108 cm2 

(chú ý : dấu "." là dấu nhân nha em ) Học tốt nha

Ex4

1 put

2 get up

3 sit down

4 write

5 give up

6 try on

7 tidied up

8 woke

9 fall down

10 switched on

Ex5

1 look for

2 Fill in

3 turn down

4 get on

5 Turn off

6 switch on

7 throw

8 take off

9 look

time Mary made a long trip was 5 years ago. 
the climate is cold, a lot of children and old people have to go to hospitals. 
go out for a meal than stay at home. 
no intention of replying to that rude letter. 
being asked about his past. 
has been offered the opportunity to study abroad. 
they send Tom a lot of presents on his birthday? 
better revise the lesson carefully for the next exam. 
being taught by Pro. Cook this semester? 
complete the construction of the lecture hall until next month. 
Who does the luggage belong to? 
We spent 3 months preparing for this festival. 
What is the price of the entry fee? 
The festival is held to thank the Rice God for the crop. 
What are you going to Da Lat in December for? 
error loss - cross entropy - stop training

Ai giúp mik tik cho

p² + 2 hay như nào em nhỉ 

Vâng cô ạ,cả chỗ p^3+2 nữa ạ