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三角函数是高中阶段学习的一种特殊函数,函数求最值的方法对于三角函数同样适用,区别是在解三角函数最值问题时,要将三角函数的知识与函数的思想有机地结合起来。因此,对考生的三角恒等变换能力、综合解题能力都提出了很高的要求。下面举例说明三角函数求最值的常用方法。1利用三角函数的有界性
Trigonometric function is a special function of high school. The method of finding the best value of function is also suitable for trigonometric function. The difference is that the knowledge and function of trigonometric function should be organically combined in solving the most value problem of trigonometric function. Therefore, the candidates of the triangular transformation of the ability to solve the problem have put forward very high requirements. The following examples illustrate the trigonometric function of the most commonly used method. 1 Utilize the boundedness of trigonometric functions