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Nguyen ANhh
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Nguyen ANhh

Chủ đề:

Chương 6: CUNG VÀ GÓC LƯỢNG GIÁC. CÔNG THỨC LƯỢNG GIÁC

Câu hỏi:

Rút gọn biểu thức :

\(L=\sqrt{\frac{1}{2}+\frac{1}{2}\sqrt{\frac{1}{2}+\frac{1}{2}\sqrt{\frac{1}{2}+\frac{1}{2}cosx}}}\) (0<x <\(\frac{\pi}{2}\))
Nguyen ANhh

Chủ đề:

Chương 6: CUNG VÀ GÓC LƯỢNG GIÁC. CÔNG THỨC LƯỢNG GIÁC

Câu hỏi:

Chứng minh đẳng thức sau :

1) \(sin^2\left(\frac{\pi}{8}+x\right)-sin^2\left(\frac{\pi}{8}-x\right)=\frac{\sqrt{2}}{2}sin2x\)

2) \(tan\frac{x}{2}\left(\frac{1}{cosx}+1\right)=tanx\)
Nguyen ANhh

Chủ đề:

Bài 1. PHƯƠNG TRÌNH ĐƯỜNG THẲNG

Câu hỏi:

Cho hình vuông ABCD có A thup d1:x +y+2=0, các đỉnh C,D thuốc đường thẳng d2: x-y-2=0 . Tìm toạ độ các đỉnh còn lại của hình vuông biết diễn tích hình vuông bằng 8.
Nguyen ANhh
Nguyen ANhh
Nguyen ANhh
Nguyen ANhh
Nguyen ANhh

Chủ đề:

Unit 12: MUSIC

Câu hỏi:

Cho dạng đúng của từ trong ngoặc 1.We are living in a house (surround)..... by green trees. 2.John was the youngest person (interview)..... yesterday. 3.Here is a test (finish)..... right now. 4.(Environment)..... are calling for the new pesticide regulations to be strictly enforced.
Nguyen ANhh

Chủ đề:

Unit 12: MUSIC

Câu hỏi:

Choose the best answer. (2.5 points) 1.The movie Schindler's List was ______ on the novel Schindlerc Ark written by the Australian writer Thomas Keneally. A. based B. depended C. played D. performed 2.There's an ______ film on at the local cinema. A. interest B. interesting C. interested D. interests 3.I bought this new software ______ Chinese. A. for learning. B. learning C. to learn D. learned 4.Van Cao is one of the most well-known ______ in Viet Nam. A. actors B. authors C. musicians D. singers 5.The soft background music made her _____ sleepy . A. to feel B. feel C. feeling D. feels 6.The movie was so ______ that we couldn't sleep last night. A. thrill B. thrilling C. thrilled D. thriller 7.- Excuse me. I'd like to rent ______ new game.
- Here you are. Sega Genesis. Please take it to ______ cashier over there. A. a/the B. the/the C. θ/the D. a/a 8.- Well, I'd better hurry. My lesson ______ at half past seven, and it's twenty five past now.
- OK. Let's go. A. starts B. will start C. is starting D. is going to start 9.Did the teacher explain how _____ this problem? A. do we solve B. can we solve C. to solve D. solve 10.She usually had a smile on her face, but now she looks ______ A. cheerful B. joyful C. solemn D. delightful
Nguyen ANhh

Chủ đề:

Unit 12: MUSIC

Câu hỏi:

Read the passage and choose the correct choice. (3 points) Up to about 1915, movies were shot and programs were made up of several works. Then, D.W.Griffith and others began to make longer films that provided the same powerful emotional appeal as did melodrama and presented spectacles far beyond what the theater could offer. Consequently, after World War I increasing numbers of spectators deserted the theater for the movies. This trend was accelerated in the late 1920s as a result of two new elements. In 1927 sound was added to the previously silent film, and thus one of the theater's principal claims to superiority vanished. In 1929 a serious economic depression began. Since audiences could go to the movies for a fraction of what it cost to see a play, theater going became a luxury that few could afford, especially as the depression deepened. By the end of World War II, the American theater had been reduced to about thirty theaters in New York City and a small number of touring companies originating there. 1. One thing that movies could do better than the theater was to ______ A. provide longer programs. B. provide emotional appeal. C. provide more melodrama. D. provide greater spectacles. 2. Up to the 1920s one objection to film was that ______ A. they were too short B. they were silent. C. they were too expensive. D. they did not tell a complete 3. One thing that made people choose the movies over the theater was ______ A. World War I. B. the fact that films were less expensive. C. the fact that films were silent. D. the fact that films were shorter. 4. By the end of the World War II, ________. A. theater had become entertainment for the masses. B. the theater was no longer considered a luxury. C. professional theatrical performances were confined mainly to New York D. There were no theatrical performances outside of New York City. 5. When the author of this paragraph says "this trend was accelerated in late 1920s" he means that ________ A. many more people went to the theater than to the movies. B. the shift away from the movies to the theater was slowed down. C. the popularity of the theater was gradually increasing. D. the shift away from the theater to the movies was speeder up.