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根据条件判断三角形的形状,这是一类常见题型.本文举例说明这类题型的几种解法,供同学们参考.一、利用三角函数的有界性判断
According to the conditions to determine the shape of the triangle, which is a common type of questions.This article illustrates several solutions to these questions for the students to reference. First, the use of trigonometric function to determine the boundedness