论文部分内容阅读
广义三角形角的关系及应用帅泽平（湖南省常德西洞庭一中４１５１３７）从所周知，在△ＡＢＣ中余弦定理表达形式之一为：ａ２＝ｂ２＋ｃ２－２ｂｃｃｏｓＡ．因这个式子揭示了三角形的边与角之间的内在联系，能否将式子表示为三角函数的形式呢？利用正弦定理ａｓｉｎＡ＝...
The relationship between the generalized triangular angles and the application of Shuai Zeping (Shandong Changde, Hunan Province, 415137) is well known. One of the cosine theorem expressions in △ABC is: a2=b2+c2-2bccosA. Because this formula reveals the intrinsic relationship between the edges and corners of a triangle, can we express the formula as a trigonometric function? Using the sine theorem asinA=...