过去进行简易地形测量(半仪器测量等)及岩层厚度、深度等的换算,一般常采用笔算数字表,以及地质用计算盘等方法,但这些方法都存在着一些缺点,不能更好地适应工作需要.兹介绍一种简易三角换算表(也是常用的图解法,只做局部修改)可解决一般常用三角函数值的换算,并能同时求出两三角函数值.换算方法及步骤如下: In the past, some simple topographic surveys (such as semi-instrumental surveys) and thicknesses and depths of rock formations were generally converted into pen-counting tables and geological calculation panels. However, these methods all have some shortcomings and can not be better adapted to work It is necessary to introduce a simple triangle conversion table (also commonly used graphic method, only partial changes) to solve the general conversion of trigonometric function values, and can also find the two trigonometric function value conversion method and the steps are as follows: