1, bring a protractor into the examination room, and when you encounter analytic geometry, you can immediately know how many degrees it is, and you can solve it if you want to order something else.

2. The last problem of conic curve is often difficult to solve. At this time, the special value method can be used to forcibly calculate the K process, that is, to simultaneously calculate δ first, and to list the expression of the solution of the problem by using the lower David theorem.

3. There is a step in the process of proving space geometry that I really can't think of directly writing unused conditions and then drawing unexpected conclusions. If the first question can't be written directly, the second question can be used directly.

4. A new method to find dihedral angle B-OA-C in solid geometry. Using cosine theorem of trihedral angle. Let dihedral angle B-OA-C be 20A, ZAOB be a, BOC be y, and this theorem is: cosOA=(cosBcosacosy)/sinasiny. If you know this theorem, you will come up with a set of formulas when you encounter the problem of finding dihedral angle in solid geometry in the exam.

5, mathematical linear programming problem, it is faster to solve the equation directly without drawing.

6. The third question, the last big question in mathematics, often uses the conclusion of the first question.

Tips for learning mathematics

1, you should be good at thinking when learning mathematics, and the answers you come up with are far more impressive than those others say.

2. Prepare well before class, so that we can better digest and absorb the unknown knowledge points in math class.

3, the mathematical formula must be memorized, and it must be deduced and can be deduced.

4. The most basic thing to learn mathematics well is to master the knowledge points of textbooks and exercises after class.

5. 80% of the scores in mathematics come from the basic knowledge, and 20% of the scores are difficult, so it is not difficult to test 120.