极坐标系是高中数学的选修内容,对于某些极坐标问题,若直接利用极坐标进行化解难度较大,而结合正、余弦定理则可轻松突破这一难点,下面举例说明.1.直线的极坐标问题例1在极坐标系中,已知点A(3,π/3),B(1,2π/3),则A,B两点间的距离为.分析将直线极坐标问题的处理转化为平面直角坐标系内求解是一种方法,这里利用余弦定理更是一种简捷的处理策略. Polar coordinate system is the high school math elective content, for some polar problems, if the direct use of polar coordinates to resolve more difficult, combined with positive and cosine theorem can easily overcome this difficulty, the following examples .1 linear Polar Problems Example 1 In polar coordinates, the distance between two points A and B is known as A (3, π / 3) and B (1,2π / 3) Processing is transformed into a plane rectangular coordinate system solution is a method, the use of cosine theorem is a simple processing strategy.