三角函数的最值是三角函数中最基本的内容 ,也是历来高考的热点 .对这类问题只要我们找到恰当的方法 ,就可以简捷地求解 .具体方法如下 :一、配方法利用二次函数配方后 ,根据三角函数的有界性 ,可求得三角函数的最值 .例 1　求函数y =cot x2 sinx +cotxsin 2x的最值 .解　y=1 + The trigonometric function is the most basic content of the trigonometric function, which is also a hot spot of the college entrance examination. For such problems as long as we find the appropriate method, we can simply solve the specific methods are as follows: First, the use of quadratic function formulation Then, according to the boundedness of the trigonometric function, the trigonometric function can be obtained. Example 1 Find the function y = cot x2 sinx + cotxsin 2x the most value. Solution y = 1 +