Using the limit method,according to the increase and decrease of parameters,the expression of tangent vector is proved in four cases,the relationship between two kinds of curve integrals in different cases is obtained,and an example is given to illustrate the correctness of the conclusion.
关键词
切向量/方向余弦/第一类曲线积分/第二类曲线积分
Key words
tangent vector/direction cosine/the first kind of curve integral/the second kind of curve integral
维普
万方数据