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2 tháng 9 2021

hình bé quá

2 tháng 9 2021

sin 650=cos 350
\(cos70^0=sin30^0\)
\(tan80^0=cot20^0\)
\(cot68^0=tan32^0\)

9 tháng 9 2021

\(3,\\ a,\dfrac{\left(1+\sqrt{x}\right)^2-4\sqrt{x}}{1-\sqrt{x}}\\ =\dfrac{\sqrt{x}-2\sqrt{x}+1}{1-\sqrt{x}}=\dfrac{\left(1-\sqrt{x}\right)^2}{1-\sqrt{x}}=1-\sqrt{x}=1-\sqrt{2}\)

\(b,\dfrac{\left(\sqrt{x}-\sqrt{y}\right)^2+4\sqrt{xy}}{1+\sqrt{xy}}\\ =\dfrac{x+2\sqrt{xy}+y}{1+\sqrt{xy}}=\dfrac{\left(\sqrt{x}+\sqrt{y}\right)^2}{1+\sqrt{xy}}\\ =\dfrac{\left(\sqrt{2}+\sqrt{3}\right)^2}{1+\sqrt{6}}=\dfrac{5+2\sqrt{6}}{1+\sqrt{6}}\\ =\dfrac{\left(5+2\sqrt{6}\right)\left(\sqrt{6}-1\right)}{5}\\ =\dfrac{3\sqrt{6}+7}{5}\)

12 tháng 9 2021

1A house had been built for her parents in Da Lat by her

2.Something must be done for these poor man

3. Mistakes haven't been made

4.Jane was promised a prize by the teacher if she worked well

5. I wasn't spoken like that before

12 tháng 9 2021

Thank you

12 tháng 3 2022

ko vào

12 tháng 3 2022

cút đê

Có ai bt lm bài này k giúp mk vs mk đang rất rất cần mong các bn giúp cho I.Change into passive voice.Chuyển các câu sau sang bị động 1. She had built a house for her parents in Da Lat ………………………………………………………………………………… 2. Somebody must do something for these poor men. ………………………………………………………………………………… 3. Nobody has made...
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Có ai bt lm bài này k giúp mk vs mk đang rất rất cần mong các bn giúp cho I.Change into passive voice.Chuyển các câu sau sang bị động 1. She had built a house for her parents in Da Lat ………………………………………………………………………………… 2. Somebody must do something for these poor men. ………………………………………………………………………………… 3. Nobody has made mistakes. ………………………………………………………………………………… 4. The teacher promised Jane a prize if she worked well. ………………………………………………………………………………… 5. Nobody spoke to me like that before. ………………………………………………………………………………… 6. Teachers should make lessons more interesting for school children. ………………………………………………………………………………… 7. We are locking the house up for summer . ………………………………………………………………………………… 8. People will tell us how much they expect of us. …………………………………………………………………………………

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có ai bt làm bài này k giúp mk vs mk đang cần rất rất là gấp mong các bn giúp choI. BỊ ĐỘNG với ĐỘNG TỪ TƯỜNG THUẬT (theo 2 cách)1.They  told me that you were the best architect in this city.……………………………………………………………………………………..……………………………………………………………………………………….2.She has reported that the flowers were killed by frost.……………………………………………………………………………………..……………………………………………………………………………………….3.Some people inform me that  the director is going to take a business trip to...
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có ai bt làm bài này k giúp mk vs mk đang cần rất rất là gấp mong các bn giúp cho

I. BỊ ĐỘNG với ĐỘNG TỪ TƯỜNG THUẬT (theo 2 cách)

1.They  told me that you were the best architect in this city.

……………………………………………………………………………………..

……………………………………………………………………………………….

2.She has reported that the flowers were killed by frost.

……………………………………………………………………………………..

……………………………………………………………………………………….

3.Some people inform me that  the director is going to take a business trip to England.

……………………………………………………………………………………..

……………………………………………………………………………………….

4.That officer announced that the meeting was delayed until next week.

……………………………………………………………………………………..

……………………………………………………………………………………….

5.He discovered that  this cotton was grown in Egypt.

……………………………………………………………………………………..

……………………………………………………………………………………….

6.They have promised that the performance will start on time.

……………………………………………………………………………………..

……………………………………………………………………………………….

7.He recommends that  we should stay at the city center.

……………………………………………………………………………………..

……………………………………………………………………………………….

8.We believed that Alice would pass the driving test.

……………………………………………………………………………………..

……………………………………………………………………………………….

9.The director notifies all the workers that they will  have to work extra hard  this month.

……………………………………………………………………………………..

……………………………………………………………………………………….

10.They have persuaded me that they will go with me to the stadium.

……………………………………………………………………………………..

……………………………………………………………………………………….

11.They have decided that the company will go to the beach together at the weekend.

……………………………………………………………………………………..

……………………………………………………………………………………….

12.People think that Maradona is the best football player  in the 20th century.

……………………………………………………………………………………..

……………………………………………………………………………………….

13.They find that the job is not suitable for a girl like her.

……………………………………………………………………………………..

……………………………………………………………………………………….

14.The teacher explained that this powerful engine pulled the train.

……………………………………………………………………………………..

……………………………………………………………………………………….

15.He told me that his football team had played well last season.

……………………………………………………………………………………..

……………………………………………………………………………………….

16. People say that the company is losing money.

……………………………………………………………………………………..

……………………………………………………………………………………….

17.  People believe that he worked very hard.

……………………………………………………………………………………..

……………………………………………………………………………………….

18. People say that they work 14 hours a day.

……………………………………………………………………………………..

……………………………………………………………………………………….

19. Someone thinks that Lan will return tomorrow

……………………………………………………………………………………..

……………………………………………………………………………………….

Rewrite these sentences :

1.        They say that she is the best singer in this town.

She                                                                                                                          

2.        They believe he will be the winner.

It                                                                                                                             

3.        People think that Tom stole food in the supermarket 3 days ago.

Tom                                                                                                                        

4.        Someone reported that the situation was under control.

The situation                                                                                                            

5.        It is said that she works 16 hours a day.

She                                                                                                                          

6.        Someone thinks that the company is planning a new advertising campaign.

The company                                                                                                           

7.        Everyone expects that the soap opera will end next year.
It                                                                                                                             

8.        It is alleged that the man drove through the town at 90 miles an hour.
The man                                                                                                                            

9.        Someone believed that the President had suffered a heart attack.
The president                                                                                                           

10.    They think that the prisoners escaped by climbing over the wall.

The prisoners                                                                                                           

11.    It is reported that the buildings have been badly damaged by fire.
The buildings                                                                                                           

12.    It is reported that many people are homeless after the floods.

Many people                                                                                                            

13.    We all expected that Marta will pass the exam.

It                                                                                                                             

14.    We knew that you are in town on the night of the crime.     

You                                                                                                                         

15.    People believe that he was killed by terrorists.
He                                                                                                                           

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26 tháng 11 2021

mk bt làm nhưng nó dài quá :)))