$\displaystyle\int\dfrac{\tan x}{\cos^2x} \, dx\\ =\displaystyle\int\tan x \, d(\tan x)\\ =\dfrac{1}{2}\tan^2x+C$
Đáp án:
Giải thích các bước giải:
Tìm nguyên hàm $\int {cos^3x} \, dx$
I. Choose the word which is pronounced differently from the others: (1mark): 1. a. took b. school c. food d. choose 2. a. please b. pleasure c. easy d. teacher 3. a. what b. who c. where d. when 4. a. hat b. house c. hour d. hang II. Choose the best answer: (3 marks) 1. ....................... does Lan have science class? a. When b. What time c. How long 2. History is ............. interesting and important subject a. a b. an c. the 3. Children should ........ to bed early. a. to go b. go c. going 4. Lan ............... reading books a. are b. is c. am 5. ................ don't you come to my house? OK. Let's go a. What b. How about c. Why 6. Blind man's bluff is a .......................... a. exercise b. game c. example 7. .............. are you doing? a. What b. Who c. When 8. Would you like ..................... badminton? a. play b. playing c. to play 9. Does Nam play marbles .................... recess? a. on b. at c. in 10. Mai learns ............. to use computer a. how b. when c. what 11. I am .............. my Math homework a. do b. doing c. to do 12. Jane is ..... beautiful than Hoa a. more b. the most c. fewer III. Put the verb in correct tense: (2 marks) 1. He (travel) to work by car. ............................................................................................................. 2. The children (play ) soccer at the moment. ............................................................................................................... 3. She (not do ) her housework every afternoon. ............................................................................................................... 4. He (buy ) a new hat tomorrow? ................................................................................................................
Làm nhanh hộ Đúng + vote 5sao +ctlhn
Cho mình hỏi Trong dạng câu "Neither S1 nor S2...." thì V chia theo S2 nhưng trong tag question thì lại chia theo số nhiều???? Cảm ơn ạ
Giúp mk câu 1,2 bài trọng âm với câu 41,42,43 với ạ
Tìm phương trình nghiệm nguyên: (x+1)(x+y)=2y(x-y)
Một bể nước hình hộp chữ nhật có chiều dài là 1,8m, chiều rộng 1,5m, chiều cao 1,6m. Trong bể có hòn non bộ. Người ta nhận thấy đổ 0,9 m3 nước thì đầy bể. hãy tính thể tích hòn non bộ trong hồ.
Choose the correct word or phrase to fill in each of the following sentences (3 marks) 1. Her parents still live there .......... her grandparents. A. for B. at C. with D. on 2. Lan is ............ than Hoa A. tallest B. tall C. taller D. more tall 3. ............... do you live? A. Who B. What C. Which D. Where 4. .................. are you talking to? A. Who B. What C. Which D. Where 5. What ................. your telephone number? A. is B. are C. does D. do 6. Nga lives ............. 52 Nguyen Hue Street. A. on B. in C. at D. under 7. ............... does your father do? A. When B. Where C. What D. Which 8. Tomorrow my family ...................... to Ho Chi Minh City. A. is B. is going to go C.is going D. goes 9. My mother takes care ............... sick children. A. about B. in C. at D. of 10. He works ................ the farm. A. on B. in C. about D.at 11. Are there .......... pens on the table? Yes, there are. A. any B. some C. much D. a 12. ........................ a beautiful day! A. It B. Which C. Where D. What Complete the sentences with on , in, at, in front of (2 marks). 1. My birthday is....................June eighth. 2. I live..............Gio Quang. 3. I get up................6 o’clock every day. 4. My house is.............................a lake.
Giúp mk từ câu 1 đến câu 25 với Mk đang cần gấp ạ Cảm ơn mọi ng nh
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