The construction of the graphs formed by eight-circuit and its secants is obtained.
本文给出了测地图包含八圈时，八圈和它上的割线构成图的结构形式。
2
Our algorithm employs the Divide and Conquer strategy, bisection and secants iteration.
该算法以二分法、割线法迭代为基础，采用分而治之策略。
3
The basic principle of this method is introduced, the recurrence formula for the tangent of secants is deduced and the flow chart of the correspondent program is presented.