极坐标系与平面直角坐标系一样,都是刻画点的位置和运动的参照物,是建立点的集合与坐标集合的对应关系的桥梁.极坐标是用距离与角度来刻画平面上点的位置的坐标形式,在探究某些与距离、角度有关的问题时,具有更大的优势.参数方程与普通方程一 The polar coordinate system is the same as the rectangular coordinate system, which is the reference to depict the position and motion of the point, and is the bridge that establishes the correspondence between the set of points and the set of coordinates. The polar coordinate is the distance and angle to depict the position of the point on the plane Of the coordinate form, in exploring some issues with distance, angle has a greater advantage.Parameter equation and general equation one