Kết quả tìm kiếm

a) \sin ^4a + \cos ^4a \dfrac{3}{4} + \dfrac{\cos 4a}{4} b) \sin ^6a + \cos ^6a = \dfrac{5}{8} + \dfrac{3}{8}.\cos 4a c) \dfrac{1- \sin 2a}{1 + \sin 2a} = \cot ^2 ( \dfrac{\pi}{4} + a) Mong các bạn giúp mình bài này ạ. Cảm ơn các bạn nhiều ạ. @kido2006 @Timeless time @chi254 @2712-0-3

Point out the sentences with: a) Complex Object b) Complex Subject c) Part of predicate 1. My plan for this weekend is to bake a delicious apple pie. 2. I am likely to be late this evening. 3. Tom was sorry to have missed Bill. 4. She is known to have been married before. 5. Jack expected...

Point out the sentences with the Infinitive as a) Subject b) Adverbial Modifier of Purpose c) Part of Compound Verbal Modal Predicate 1. To wait for people who were late made him angry. 2. In order to get rid of her headache, Sally took an aspirin. 3. I have to feed the animals as well...

Choose the right form of the Infinitive or the Gerund for filling in the blank. 1. I am looking forward ... you on Sunday. a) to seeing b) to see c) see 2. Please, let me ... to the hockey match. a) to go b) go c) going 3. Would you mind ... the last sentence? a) repeating b) to...

Point out the sentences with Ving as a gerund (a), an adjective (b) or part of the main verb (c). 1. The mother insisted on his being examined by a doctor. 2. Having studied hard, he got a good mark at the exam. 3. I had no idea of your being here. 4. Being ill, she couldn’t go to the theatre...

Find the Vietnamese equivalents for the following English sentences. 1. Thank you for coming. 2. I am surprised at hearing this. 3. We are concerned about the students’ taking the exam in time. 4. Besides being clever, he is very industrious. 5. Lobachevsky’s having developed a new geometry is...

Point out the sentences with: a) Gerund b) Participle I c) Verbal Noun 1. Taking a key out of his pocket, he opened the door. 2. After finishing school, we entered the University. 3. I was disturbed by their loud talking. 4. Before passing his exams he worked hard. 5. There is no hope of...

I. Point out the sentences with: a) Gerund as Subject b) Participle I as Adverbial Modifier 1. Being very tired, we refused to go for a walk. 2. Discussing the details of this contract is essential. 3. Having been defeated, the enemy had to retreat. 4. Knowing grammar rules is my aim in...

Choose the right form for filling in the blank. 1. I don’t mind your ... my telephone. a) having used b) being used c) using 2. You never mentioned ... to them on the subject before. a) being spoken b) having been spoken c) having spoken 3. This dress wants ... . a) washing b) having washed c)...

Complete the following news items by choosing a, b or c. Two schoolgirls, who were sent home for wearing make-up, __1__ miss their university entrance examinations if they __2__ return to school next week. “If the girls __3__ take these exams,” complained one parent, “they __4__ go to...

Determine the most appropriate modal verb for each request in order of politeness: a) Could, you possibly... b) Will you... c) Would you... d) Can you... e) Could you... 1. The air-conditioner won’t work. “Oh, excuse me. ... send an electrician to our room? The air-conditioner isn’t...

Tính giá trị của biểu thức A=(1+tan1°).(1+tan2°)...(1+tan45°) Mình cảm ơn các bạn nhiều ạ. @Mộc Nhãn @Cáp Ngọc Bảo Phương @HT2k02(Re-kido) @vangiang124

Ba vật có cùng khối lượng m = 200g được nối với nhau bằng dây nối không dãn như hình vẽ. Hệ số ma sát trượt gjữa vật và mặt bàn là . Lấy . Tính gia tốc khi hệ chuyển động. Mình cảm ơn các bạn nhiều ạ.

Xem hệ cơ liên kết như hình vẽ: ; ; hệ số ma sát giữa vật và mặt phẳng nghiêng là ; ; . Tính sức căng của dây? Mình cảm ơn các bạn nhiều ạ.

:Tonton18 Cho \sin 3x \sin x+\sin (x-\dfrac{\pi}{3})\cos (x-\dfrac{\pi}{6})=0. Tính \cos 2x Mình cảm ơn các bạn nhiều ạ.

Thu gọn biểu thức P=cosα + cos3α + cos5α + … + cos (2n-1)α với n ∈ N*, α ≠ k (k ∈ Z). Mình cảm ơn mọi người nhiều ạ.

Tìm m để tổng GTLN và GTNN của biểu thức P = 4.cos(a/2)^2-cos2a+m bằng 5. Cảm ơn mọi người nhiều ạ.

Cho △ABC thoả mãn sinA + sinB + sinC = 1 - cosA + cosB + cosC. Chọn khẳng định đúng về △ABC. A. △ABC vuông. B. △ABC tù. C. △ABC nhọn. D. △ABC đều. Mình cảm ơn mọi người ạ. @vangiang124 @Mộc Nhãn @Cáp Ngọc Bảo Phương @Timeless time

Có bao nhiêu giá trị nguyên của tham số m thuộc đoạn [-10; 10] để hệ bất phương trình dưới đây có nghiệm? \begin{cases} 2x-1>0\\x-m<2 \end{cases} Mình cảm ơn các bạn nhiều ạ.

Trong mặt phẳng toạ độ Oxy cho hình vuông ABCD có đỉnh A(8;2) và một đường chéo có phương trình 2x-3y+3=0. Toạ độ đỉnh là C(a;b). Tính tổng a+b. Mình cảm ơn các bạn nhé.