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用解析的观点来处理二三角问题,是一个比较新颖、富有特色的方法。它可以将复杂的三角变换转化成具有直观背景的代数运算。本文着重介绍直线在某些三角问题中的一些应用。一、直线斜率性质的应用一条直线绕其上一定点以平行于y轴的方向为始边,逆时针旋转180°时,其斜率k从—∞单调增加到+∞。利用斜率的这一性质,
The use of an analytical point of view to deal with the problem of the two triangles is a relatively novel and characteristic method. It can transform complex triangular transformations into algebraic operations with an intuitive background. This article focuses on some applications of straight lines in some trigonometric problems. First, the application of the linear slope nature of a straight line around a certain point in the direction parallel to the y-axis as the beginning of the counterclockwise rotation of 180 °, the slope from the monotonic k monotonically increased to + ∞. Using this property of the slope,