1. Men and women should be treated _______ at work. (equal)

2. Joining international _______ will bring many benefits to a country. (organise)

3. More men are now taking jobs _______ done by women. (tradition)

4. _______ gives girls the opportunity to have a better life. (educate)

Sử dụng 15° = 45° – 30°, hãy tính các giá trị lượng giác của góc 15°.