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在解决有关三角形的问题时,正、余弦定理是一个很重要的工具,它们可单独或者联合解决一些问题,下面举例说明.1.正弦定理解决的问题例1如图:在斜度一定的山坡上的一点A测得山顶上一建筑物顶端C对于山坡的斜度为15°,
In solving problems related to triangles, the positive and cosine theorem is a very important tool. They can solve some problems individually or in combination. The following examples are used to illustrate: 1. Problems solved by the sine theorem. Example 1 As shown in the figure: In the slope of a certain slope The point A on the top of a building on the top of the hill measured 15 degrees from the slope of the hillside.