2. Solve the triangle problem;

3. General term and sum of series;

4. Use the space vector to find the angle;

5. Range problem in conic curve:

6. Exploratory problems in analytic geometry;

7. Mean value and method of discrete random variables;

8. Monotonicity, extreme value and maximum value of a function.

Extended data:

Since the 1950s, China's middle school mathematics syllabus has been revised many times, but all of them have the same guiding ideology, that is, to do well the three basics. It is emphasized that a correct understanding of mathematical concepts is the premise of mastering the basic knowledge of mathematics. At present, the outstanding problem in China's mathematics teaching is to ignore the correct understanding of the mathematical foundation, that is, the mathematical concept.

On the one hand, textbooks underestimate students' understanding ability, and in order to "reduce the burden", dilute or even avoid some basic concepts that are difficult to understand; On the other hand, the exam-oriented strategy of "sea tactics" makes teachers have insufficient time and energy to study how to make students deeply understand basic mathematical concepts.

Baidu encyclopedia-high school mathematics