关于在极坐标φ=φ(r)形式下定积分的应用

On Application of the Definite Integral under the Polar Coordinate φ=φ(r)

本文对=(r)的形式进行讨论,推导出平面图形的面积、曲线的弧长、旋转体的面积及表面积公式。

The essay discusses the four of =φ=φ(r) and conducts the area of plain sheet,the arc length of curve,the volume of the revolver and the surface formula.