有限数学 示例

求解最简化梯阵形式 [[cos(x),sin(x),xcos(x),xsin(x)],[-sin(x),cos(x),cos(x)-xsin(x),sin(x)+xcos(x)],[-cos(x),-sin(x),-2sin(x)-xcos(x),2cos(x)-xsin(x)],[sin(x),-cos(x),-3cos(x)-xsin(x),-3sin(x)xcos(x)]]