Gọi α, β, γ lần lượt là các góc tạo bởi các đường thẳng trên trục Ox.

Chứng minh rằng$tg\alpha =1,tg\beta =\frac{1}{\sqrt{3}},tg\gamma =\sqrt{3}$

Tính số đo các góc α, β, γ.

Choose the best answer.

I think you should buy _____  pack of mineral water instead. And you can also buy _____  snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______  cookies and soft candies.

Choose the best answer.

We should decorate our living room with _____ orange banner. We also need ________  ribbons, balloons, party hats and costume.

Choose the best answer.

I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.