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三角函数最值问题,类型多、方法活.构造图形求三角函数最值,可以使繁琐的过程直观化,给人耳目一新的感觉.下面举例说明.
The trigonometric function is the most problematic, with many types and methods. Constructing a graph to find the trigonometric function can make the tedious process intuitive and give people a fresh feeling. Here’s an example.