为数据库Foxbase添加三角函数

Study of Adding Triangle Function in Foxbase

本文利用自定义函数方法为Ｆｏｘｂａｓｅ数据库管理系统添加正弦、 余弦、正切、余切函数，并可象其它函数一样任意调用。

This paper gives a new method of adding triangle functions as sin ( )&, cos ( ), tan ( ) & cot ( ) in the management system of Foxbase by setting up self - definated functions. Each definated function can be used as easily as any other Foxbase function.