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解三角形的主要内容就是正弦定理、余弦定理、面积和夹角计算公式,相对来讲知识点比较简单,但要真正地学好,除熟练掌握三角函数的相关公式外,还要掌握解三角形的一些基本方法和技巧,下面举几例说明.一、化边为角,化角为边例1在△ABC中,a2tan B=b~2 tan A,试判断△ABC的形状.分析:已知等式中既有边,又有角,既可考虑化边为角,又可考虑化角为边.
The main content of the solution triangle is sine, cosine theorem, area and angle calculation formula, relatively speaking point of knowledge is relatively simple, but to really learn, in addition to proficiency trigonometric function of the formula, but also master some of the solution of the triangle Basic methods and techniques, a few examples below. First, the edge of the corner, the corner of the case 1 In △ ABC, a2tan B = b ~ 2 tan A, try to determine the shape of △ ABC. In both the existing side, there are angles, both to consider the edge of the corner, but also consider the angle of the edge.