简单介绍运用坐标变换和方向余弦这两种方法对导弹运动方程组的20个方程中的3个几何关系方程进行求解的过程。这两种方法均运用线性代数中矩阵的性质与计算,结合坐标系的转换关系,最终从不同路径获得相同的结果,并对结果进行进一步分析。 This paper briefly introduces the process of solving three geometrical equations in 20 equations of missile motion equations by using two methods: coordinate transformation and direction cosine. Both of these methods use the properties and calculations of matrices in linear algebra, and combine the conversion relations of coordinate systems to finally obtain the same results from different paths and further analyze the results.