1、? Trigonometric function question type

Pay attention to the correctness of normalization formula and induction formula.

2、? Conic curve question type

Note that when solving the trajectory equation, three kinds of curves (ellipse, hyperbola and parabola) are considered. Ellipse is the most frequently tested, and the methods include direct method, definition method, intersection method, parameter method and undetermined coefficient method.

3、? Statistical and probabilistic problems

Master the principles of classified counting and step counting, and use them to analyze and solve some simple application problems; Understand the meaning of combination and master the calculation formula and properties of combination number.

4、? Function and derivative problems

The mixed problem of derivative and analytic geometry or function image is an important type, and it is also a direction to examine comprehensive ability in college entrance examination (Weibo), so we should pay attention to it.

5、? Derived extreme questions

First, find the definition domain of the function and correctly find the derivative, especially the derivative of the composite function. Generally, monotonous intervals can't be combined, so use "and" or ","(know the function to find the monotonous interval without equal sign; Know monotonicity, find the parameter range, with equal sign).