It is known that f(x)=ax-sinx, sinx/(cosx) 3,0.

Problem-solving skills in mathematics final of college entrance examination

1, missing step solution

If you encounter a difficult problem, break it down into many small steps, try to connect these steps in series, and then write them down step by step. When the process is not clear in some steps, you can write the conclusion directly by guessing or special methods, and then write it later until you can't write it. Although there are some uncertainties, you can really get the highest score.

2, step by step answer

We can reduce the difficult link to a simple problem that can be solved from the general to the special, from the abstract to the concrete, from the variable to the constant, and then summarize the special cases to reach the general solution. Although we may not get all the scores, we still have some.

3. Auxiliary solution

In the process of solving or analyzing a topic, in addition to the process of coming out of the main line, many auxiliary explanations are needed, and these steps also have scores, so if the main process can't go on, you can also add these branches, which will have scores, such as making accurate images, extending conditions, setting unknowns and so on.