Tìm tập xác định của hàm số sau $a,y=\frac{1+sinx}{cos2x}$ $b,y= √\frac{3}{2}-sin^{2}x$

Giúp mình vs ạ. Mình gấp lắm. Mình vote 5*

1. All students had to stay at home because it is very wide => The gate is..................................... 2. Tom was very brave boy, so all his friends admired him => Tom was....................................... 3. The room was so comfortable that we all fell asleep easily => The room was.................................... 4. It was too cold for them to keep working in the field => It wasn't........................................................ 5. The question was so hard that we couldn't answer it => The question wasn't........................................ 6. You're too young to drive that car => You are not.................................

__________ 1, 4- √ 21-8 √5 _______ 2. √4-2 √3 +1 rút gọn biểu thức nhiều căn

giúp mình LÀM Và GIẢI THÍcH nhé. hứa vote5*

Bạn nào lm hộ mk vc . Làm đc vote 5 sao

Trong mặt phẳng Oxy, giao điểm của đường thẳng ( Δ ) : {$\frac{x=2-t}{y=-6+2t}$ với trục tung có tọa độ là: A. (5;0) B. (0;-10) C. (-1;0) D. (0;-2) Mình yêu cầu lời giải đàng hoàng

Fill in the blanks with the imperative form (positive or negative) of these verbs: place (2), clean, eat, make, switch, use, put, leave, keep. How to set up your computer 1. _______________________________ your computer on a flat table or desk. 2. _______________________________ sure your chair is a comfortable height. 3. _______________________________ a screen to protect you from dangerous X-rays. 4. _______________________________ it near a fire or the central heating. 5. _______________________________ your computer in the sun. 6. _______________________________ liquids (water, ect.) on the computer; they may get inside. 7. _______________________________ while you’re working; food can fall into the keyboard. 8. _______________________________ the computer and dust it regularly. 9. _______________________________ the floppy disks clean and in their box. 10. Always ______________________________ off the computer and the screen when you finish.

Giải hộ mình: Xác định biên độ, tần số góc, chu kì, tần số và pha ban đầu 1. x = -25π^2cos(5πt +π/2)cm/s2 2. x= -50π^2sin(5πt +π/3) cm/s2 (Ở chỗ π có bình phương nên mình ghi π^2)

giúp mình làm bài này với! mình nối thành các cụm r á! bh các bạn làm và ghi nghĩa cụm mình ghi thôi