F1 and F2 and F3, they are XYZ axis of the three components, together to form a space vector, XY first form a plane and then rotate around the X axis to get a three-dimensional map, each rotation of an angle The vector on the XY plane changes. That is, the vector on the 3D graph is related to the point on the XY plane and the rotation angle, and I used to use the quiver3 but not to draw the desired 3D graph.
translation:请教个问题：三个表达式?F1和F2和F3，它们是XYZ轴的三个分量，合起来形成空间矢量，XY先形成一个平面??然后绕X轴旋转得到三维图，每旋转一个角度XY平面上的矢量就变化。也就是这个3D图上的矢量由XY平面上的点和旋转角度有关，我之前用quiver3但是不能完全画出来想要的3D图 公式是这样的
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