So the idea of spherical coordinate is you're going to polar coordinates again in the rz plane.
所以说球坐标系,其实就是在rz平面再建立一个极坐标。
Remember that polar coordinates are about replacing x and y as coordinates for a point on a plane by instead r, r and theta,which is the angle measured counterclockwise from the positive x-axis.
极坐标是关于r，θ的,用r，θ代替平面上一点的x，y坐标，是从原点到那一点的距离，，which，is，the，distance，from，the，origin，to，a，point，θ是由x轴逆时针旋转,而得到的夹角。
Understand what the differences are between polar coordinates and the Cartesian plane.
了解之间的差异极坐标和直角平面。
A new method is proposed to analyse the motion of plane mechanism by means of complex polar coordinates vector method.
提出用复数-极坐标矢量法(简称复矢量法)来分析平面机构的运动。
A new method is proposed to analyse the motion of plane mechanism by means of complex polar coordinates vector method.
提出用复数-极坐标矢量法(简称复矢量法)来分析平面机构的运动。
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