cot2x=tanx tan(pi/3-x)=cotx giải pt lượng giác

Cho mạch điện: R1=60 Ôm R2=40 Ôm IA=0,5 A Tính: a) Rtđ b) Chỉ số V c) HĐT 2 đầu mỗi điện trở và cả mạch

1."Don't gather at public places, son ",said the mother ->The mother told her son_____ 2.Many IOS and Android users have downloaded NCOVI which is a health reporting ->NCOVI which is a app_______

6. It is expected that the prices will rise again this month. They_________________________________________________________________ The prices _________________________________________________________ 7. It is proved that life doesn’t exist on the moon. Scientists_____________________________________________________________ Life ______________________________________________________________ 8. They say that he has passed the final exam with the best result. It____________________________________________________________________ He is ____________________________________________________________ 9. He is said to have been in the army. People say ________________________________________________________ 10. It is believed that the man escaped in a stolen car. People _______________________________________________________________ The man __________________________________________________________ 11. People say that he has been all over the world. It____________________________________________________________________ He _______________________________________________________________ 12. It is believed that the man is 108 years old. People_______________________________________________________________ The man _________________________________________________________ 13.People believe that Omachi was staying in Quangnam then. It______________________________________________________________ Omachi________________________________________________________ 14. They think that Danny is cleaning the floor. It____________________________________________________________ Danny_______________________________________________________ 15. They thought that Nha had had her photos taken. It____________________________________________________________ Nha_______________________________________________________ 16. People think that Omachi has been punished by the teacher. It____________________________________________________________ Omachi_______________________________________________________

Bài 4: (3,5 điểm) Cho tam giác ABC nhọn (AB < AC) có M, N thứ tự là trung điểm của AB, BC. a) Biết AC = 9cm. Tính độ dài của MN. b) Gọi E là điểm đối xứng của N qua M và P là trung điểm của CE. Đoạn CE cắt AB tại L. Chứng minh AEBN là hình bình hành và PC = 3.PL. c) Vẽ đường cao AD của tam giác ABC. Gọi Q là điểm đối xứng của P qua BC. Chứng minh DPNQ là hình thoi. d) Tia QN cắt tia EA tại S. Chứng minh BNSE là hình thang cân. Giúp mình bài này với

Em hãy tìm hiểu và trình bày tóm tắt về một vài loại di sản văn hoá vật thể hoặc di sản văn hoá phi vật thể của địa phương, của đất nước mà em biết.

11. Tom, _________ who sister is a teacher, is in my class. 12. The White House, _________ the US president lives, is in Washington. 13. My brother, _________ works in Warsaw, earns a lot of money. 14. Venice, is in Italy, _________ is a very old city. 15. The Ritz Hotel, _________ we stayed last year, is very expensive. 16. John Lennon, _________ was born in 1940, was a member of The Beatles. 17. My car, _________ I bought last month, broke down again. 18. Molly, _________ father is from Paris, speaks French very wel Combine each pair of

giúp mình câu này với mình hứa sẽ đánh giá 5 sao

II. Read the sentences. Circle the correct answers. 1. I like__________ because I like reading stories. A. literature B. math C. physics D. biology 2. I like to learn about plants and how they grow. I like__________. A. I.T B. biology C. history D. math 3. I like computers. That's why I like__________. A. I.T B. P.E C. history D. physics 4. I love to learn about mountains and rivers. I like__________. A. I.T B. physics C. English D. geography 5. I don't like running and playing sports. I don't like__________. A. literature B. P.E C. math D. history 6. Studying helps me learn about countries around the__________ world and famous people in the past. A. music B. history C. biology D. math 7. I love to learn how light, heat, and sound work. I love__________. A. geography B. biology C. physics D. music help me!!!

27.72+27.27+27 Giúp mình với nha