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正、余弦定理在解三角形中应用较广,其中判断三角形形状考查得比较多.利用两定理可以实现三角形中边、角的统一,以达到判定目的.下面举例说明正、余弦定理在判断三角形形状中的应用.
The positive and cosine theorem is widely used in solving triangles, in which the shape of the triangle is judged more often. Using the two theorems can achieve the unity of the edges and corners of the triangle to achieve the purpose of determination. Here is an example of the positive and cosine theorem in the judgment of the shape of the triangle In the application.