Trigonometric probability solid geometry of sequence must be summarized into several types, forming a problem-solving routine, and gaining time for analysis and derivation. There is not enough time, and it is definitely wrong to be nervous.

Practice at ordinary times, don't feel that you have completed the task as long as you do the right question. By increasing the training of multiple solutions to one problem and optimizing the thinking of solving problems, complex calculations can be avoided. For example, if you can use geometric methods, you must not go to simultaneous equations. When calculating the chord length analytically, the linear parameter equation is introduced, and the geometric meaning of t can reduce a lot of calculation.

The above is just a general statement. You can also send a few specific wrong questions to help you summarize.