Cho góc nhọn α
a) Rút gọn biểu thức S=\(\cos^2\alpha+tg^2.\cos^2\alpha\)
b) Chứng minh:
\(\dfrac{\left(\sin\alpha+\cos\alpha\right)^2-\left(\sin\alpha-\cos\alpha\right)^2}{\sin\alpha.\cos\alpha}=4\)
Help me plsssssssssss
\(\dfrac{\left(sina+cosa\right)^2-\left(sina-cosa\right)^2}{sina.cosa}=4\\ VT=\dfrac{sin^2a+2sinacosa+cos^2a-sin^2a+2sinacosa-cos^2a}{sinacosa}\\ =\dfrac{4sinacosa}{sinacosa}=4=VP\)
a: \(S=cos^2a\left(1+tan^2a\right)=cos^2a\cdot\dfrac{1}{cos^2a}=1\)
b: \(VP=\dfrac{1+sin2a-1+sin2a}{\dfrac{1}{2}\cdot sin2a}=\dfrac{2\cdot sin2a}{\dfrac{1}{2}\cdot sin2a}=4=VT\)
a) S= \(cos^2a\left(tg^2a+1\right)=cos^2a.\dfrac{1}{cos^2a}=1\)
Make complete sentences, using the prompts given.
1. price/ include/ meals
2. call/ us/ now
3. call/ make/ appointment 708-0525
4. we/ be/ open/ 9 to 5 weekdays
5. we/ help/ you/ move
6. we/ will go/ anywhere/ you/ want
7. not/ miss it
8. first fifty customers/ will receive/ free gift
9. if/ you nut one/ ,/ next/ one/ be/ free
10.this/ be/ your chance/ save money/ !
1 The price includes the meals
2 Please call us now
3 Call to make an appointment at 7080525
4 We are opened from 9 to 5 on weekdays
5 We will help you to move
6 We will go anywhere you want
7 Don't miss it
8 The first fiffty customers will receive the gift
9 If you nut one. the next one will be free
10 THis is you chance to save money
1.The price includes the meals
2.Please call us now
3.Call to make an appointment at 7080525
4.We are opened from 9 to 5 on weekdays
5.We will help you to move
6.We will go anywhere you want
7.Don't miss it
8.The first fiffty customers will receive the gift
9.If you nut one. the next one will be free
10.THis is you chance to save money
1.The price includes the meals
2.Please call us now
3.Call to make an appointment at 7080525
4.We are opened from 9 to 5 on weekdays
5.We will help you to move
6.We will go anywhere you want
7.Don't miss it
8.The first fiffty customers will receive the gift
9.If you nut one. the next one will be free
10.THis is you chance to save money
Complete the second sentence using the word given, so that it has a similar meaning to the first one:
The door to the basement isn't to be left open on any account. (ACCOUNT)
=> On ...
The door to the basement isn't to be left open on any account. (ACCOUNT)
=> On no account should the door to the basement be left open
Make sentences based on the words given.
1, it / be / necessary / have / a day / celebrate / ourparents
2, children / have / special day / express/ feelings / memories / and love / their parents
3 , we / have / opportunity / enhance / family traditions
4 , sunday / a day off / so / everybody / free / work / study
HELP ME !
Make sentences based on the words given.
1, it / be / necessary / have / a day / celebrate / ourparents
-> It is necessary to have a day to celebrate for our parents.
2, children / have / special day / express/ feelings / memories / and love / their parents
-> Children have a special day to express feelings, memories and love for their parents.
3 , we / have / opportunity / enhance / family traditions
-> We have the opportunity to enhance family traditions.
4 , sunday / a day off / so / everybody / free / work / study
-> Sunday is a day off so everybody is free of work and study.
Make sentences based on the words given.
1, it / be / necessary / have / a day / celebrate / ourparents
=> It is necessary to have a day to celebrate our parents.
2, children / have / special day / express/ feelings / memories / and love / their parents
=> The children have a special day to express their feelings and memories and love with their parents.
3 , we / have / opportunity / enhance / family traditions
=> We have an opportunity to enhance my family tradiations.
4 , sunday / a day off / so / everybody / free / work / study
=> Sunday is a day off so everybody free their work and study.
1. A child mustn't be given/should not be given everything he or she wants.
2. He might be presented/may be presented with an award for his hard work on gender equality.
3. The entire lake can be seen/should be seen from their flat on the 7th floor.
4. Efforts should be made/can be made to offer all children equal access to education.
5. Sunrise might be observed/can be observed in the early morning hours.
6. I think everybody should be provided/must be provided with equal access to health service
1. should not be given
2. may be presented
3. can be seen
4. should be made
5. can be observed
6. must be provided
1. SHOULD NOT BE GIVEN
2. MIGHT BE PRESENTED
3. CAN BE SEEN
4. SHOULD BE MADE
5. CAN BE OBSERVED
6. SHOULD BE PROVIDED
Chắc chắn đúng đó ^^
GOOD LUCK !!!!
D.WRITING
Use the words or phrases given below to complete a passage about the common cold. An example (0) is done for you. (2.5pts)
0. Everybody / know / symptoms of the common cold: a runny nose, a slight fever, coughing and sneezing.
=> Everybody knows the symptoms of the common cold: a runny nose, a slight fever, coughing and sneezing.
1. It / very unpleasant / but nobody / know a cure.
2. At the drugstore / there / usually shelves with cold “cures”.
3. These medicines / not / cure a cold / but / do relieve / symptoms.
4. Whatever / you do / your cold /last /a few days and then disappear.
Combine the sentences into a new one using the given words in brackets. DO NOT change the given words in any ways.
____________________________________________________________
Câu 38. Everybody had left. We came to the party. (By the time)
____________________________________________________________
Câu 39. She had a cold. She took some medicine. (because)
____________________________________________________________
Câu 40. His mother tongue is French. He speaks English like a native. (although)
Câu 37. The ship carried coal. It arrived last night. (carrying)
____________________________________________________________
38. By the time we came to the party, everyonehad left
39. She took some medicine because she had a cold.
40. Although his mother tongue is French, he speaks English like a native.
37. The ship carrying coal arrived last night
Câu 38. Everybody had left. We came to the party.
(By the time) By the time we came to the party, everybody had left
Câu 39. She had a cold. She took some medicine. (because) she took some medicine because she has a cold
Câu 40. His mother tongue is French. He speaks English like a native. (although) Although his mother tongue is French, he speaks English like a native.
Câu 37. The ship carried coal. It arrived last night. (carrying)
The ship carrying coal arrived last night.
Combine the sentences into a new one using the given words in brackets. Do NOT change the given words in any ways.
28. The ship carried coal. It arrived last night, (carrying)
_____________________________________
29. Everybody had left. We came to the party. (By the time)
_____________________________________
30. She had a cold. She took some medicine, (because)
_____________________________________
31. His mother tongue is French. He speaks English like a native, (although)
_____________________________________
28. The ship carried coal. It arrived last night, (carrying)
______The ship carrying coal It arrived last night,_______________________________
29. Everybody had left. We came to the party. (By the time)
_______Everybody had left by the time came to the party.______________________________
30. She had a cold. She took some medicine, (because)
________ Because she had a cold, she took some medicine_____________________________
31. His mother tongue is French. He speaks English like a native, (although)
_______Although his mother tongue is French, he speaks English like a native______________________________
She ______________ an opportunity to go abroad to study A. given B. be given C. might give D. might be given
She ______________ an opportunity to go abroad to study
A. given B. be given C. might give D. might be given
