【實用工具app】RigTrig|最夯免費app-綠色工廠好玩App

This simple App calculates the length of side of a triangle that represents the displacement of rig in relation a point of observation. And calculates the angle formed between two sides of the triangle. This angle is the generated by the spin of the rig. The App presents these two modules for calculation. You can choose the kind of calculate to be done at the main menu.