有一道数学题：dx/dy = cx - by ,dy/dt = tx+ay,要求做极坐标变换,

题目

有一道数学题：dx/dy = cx - by ,dy/dt = tx+ay,要求做极坐标变换,

答案

直角坐标变换极坐标
x=pcosθ,y=psinθ
dx=dpcosθ-psinθ
dy=dpsinθ+pcosθ
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