phương trình 3sin^2 x + sin 2x + cos^2 x = 3 có tất cả bao nhiêu nghiệm trong khoảng (- pi 2 ;3 pi) ?

1.phân tích Nhân vật bà cô bé hồng trong cuộc đối thoại giữa Cậu bé Hồng và bà cô 2. Viết bài văn phân tích tình yêu thương mẹ của chú bé Hồng

Lập dàn ý về suy nghĩ của em về vấn nạn bóc lột sức lao động của trẻ em dưới 15 tuổi

mn giúp em nhé!em ko có nhiều điểm nên thông cảm

Reorder the words to have correct sentences 61. the/on/the/right/on/is/bookstore ..................................................................... 62. tell/you/could/to/me/how/the/to/get/post office/? ................................................................ 63. she/like/to/some/would/buy/stamps ......................................................................... 64. always/church/he/to/goes/Sundays/on ........................................................................... 65. soccer/boys/often/the/recess/play/at/do/? ....................................................................... 66. the/Lan/playing/piano/is ................................................................................................. 67. do/what/at/often/do/you/recess/? ...................................................................................... 68. enjoys/Physics/Hoa/always/learning ............................................................................. 69. bed?/go/you/what time/ do/to ........................................................................................ 70. get/I/at/six/often/up / don’t

Giúp mình nhé còn 60 phút nữa để nộp bài Yêu cầu không spam làm nghiêm túc vì là bài thi thử

Câu 1: Cho tứ giác ABCD có ∠A bằng ∠B và BC=AD.Chứng minh: a)ΔDAB=ΔCBA,từ đó suy ra BD=AC b) ∠ADC= ∠BCD Mn giúp em vs em cần gấp Em cảm ơn

cho hệ pt: x+my = 2 :mx+y = m+1 tìm m để hệ pt có nghiệm duy nhất

Ghi luôn giúp mik lí do tại sao lại chọn câu đó nha

Part 1: Rewrite each sentence beginning as shown, so that the meaning remains the same. Example: He wrote the letter in two hours. It took him two hours to write the letter. 1. The keepers feed the lions at 3 pm every day. The lions ................................................................................................................................ 2. We got lost because we didn't have a map. If we ........................................................................................................................................ 3. I would prefer you to deliver the sofa on Friday. I would rather......................................................................................................................... 4. The bridge was so low that the bus couldn't go under it. It was ....................................................................................................................................... 5. That was a silly thing to say. What ........................................................................................................................................ 6. We've run out of tea. There........................................................................................................................................ 7. I last saw him when I was a student. I haven't .................................................................................................................................. 8. Susan was too excited to sleep. Susan was ............................................................................................................................... 9. Robert has not had a job for two years. Robert has been ..................................................................................................................... 10. She will complete the work only she is paid extra. She will not ........................................................................................................................ Part 2 Use the words in the brackets to combine the following sentences. 1. All the students love the principal. He is very kind. (because of) ................................................................................................................................. 2. I have forgotten the tickets. I’m sorry for it. (having) ................................................................................................................................ 3. I saw it with my own eyes. I believed it. (if) ................................................................................................................................ 4. The house at the end of the street has been sold. It has been empty for years. (which) ............................................................................................................................. 5. It's a pity he doesn't take the doctor's advice. (wish) ............................................................................................................................