Cái này là sai nha bạn
Nếu đúng thì phải là:
sin^2a + cos^2a =1
( cái dấu ^ là mũ nha)
CHÚC BẠN HỌC TỐT !!
sin a + cos a = 1
đúng hay sai?
Đáp án:
Sai.
Giải thích các bước giải:
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.
We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.