Cho biết (sin dfrac{alpha }{3} = dfrac{4}{5}). Giá trị của (P = 2{sin ^2}dfrac{alpha }{3} + 5{cos ^2}dfrac{alpha }{3}) bằng bao nhiêu?

Câu hỏi: Cho biết (sin dfrac{alpha }{3} = dfrac{4}{5}). Giá trị của (P = 2{sin ^2}dfrac{alpha }{3} + 5{cos ^2}dfrac{alpha }{3}) bằng bao nhiêu?  Lời giải tham khảo: Đáp án đúng: A Ta có ({sin ^2}dfrac{alpha }{3} + {cos ^2}dfrac{alpha }{3} = 1 Rightarrow {cos ^2}dfrac{alpha }{3} = 1 – {left( {dfrac{4}{5}} right)^2} = dfrac{9}{{25}}) […]

Choose the word whose underlined part is pronounced differently from that of the others: plants, animals, seasons, trees

Choose the word whose underlined part is pronounced differently from that of the others Question: Choose the word whose underlined part is pronounced differently from that of the others: plantS, animalS, seasonS, treeS Reference explanation: Correct answer: A There are three rules for pronouncing the s/es ending: Rule 1: Pronounce /s/ when ending in -p, […]

Question 46: Choose the correct answer A,B,C or D so that they have the same meaning as the original ones. Madeleine wears high heels to look taller.

Question 46: Choose the correct answer A,B,C or D so that they have the same meaning as the original ones. Madeleine wears high heels to look taller. A. In order to look taller, Madeleine wears high heels B. So that to look taller, Madeleine wears high heels. C. Madeleine wants high heels to make her […]

Sentence 29: Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions. There is always conflict between parents and children. However, they still should talk and share things with each other.

Sentence 29: Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions. There is always conflict between parents and children. However, they still should talk and share things with each other. – Question and Answer English online Link Hoc va de thi […]

Choose the underlined part that needs correction: The weather was very nice (A), so he found (B) it necessity (C) to bri

Câu hỏi: Choose the underlined part that needs correction: The weather was very nice (A), so he found (B) it necessity (C) to bring a raincoat with (D) him. Lời giải tham khảo: Đáp án đúng: C Find + smt + tính từ + to V: thấy cái gì đó như thế nào khi làm gì… necessity ⇒ unnecessary Tạm dịch: Thời tiết thật […]

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