plane trigonometry

• 平面三角学,平面三角

plane trigonometry的用法和样例：

例句

1. By means of spherical graphics and plane trigonometry, space angle and space point coodinates are calcullated for three sets of combined fixtures as examples.
   运用球面图法及平面三角法，计算了三种组合夹具实例的空间角度及空间点的坐标。