2, if it is imminent, you can only relax, be careful when doing the problem, and don't be sloppy in calculation. I don't know how old you are. I just graduated from high school. Based on my long-term experience, I can remind you that sometimes you have to give up, but if you choose to fill in the blanks, you will never be blank, and you will get one if you can't write or you can't figure it out. For example, fill in the blank, you can ask for a certain angle, you can choose a special angle, 30, 45, 60, 90. If I really can't figure it out, I usually write π/3. Multiple choice questions are easier to guess, you know. Some questions are also very deceptive, and there is no need to calculate them at all ... Write down all the big questions that you can't do, there is nothing to worry about, and where can you solve them. It is the right way to leave more time for the problems you can do!