论文部分内容阅读
反证法是重要的数学方法,在证明三角题时也常用到,那么它主要适用于什么情形呢?一、用于结论否定型例1．已知a是无理数,求证:函数f(x)=cosax+cosx不是周期函数。
The counter-evidence method is an important mathematical method. It is also commonly used to prove trigonometric problems. What is the situation in which it is mainly applied? Knowing that a is an irrational number, verify that the function f(x) = cosax + cosx is not a periodic function.