If you have not used a scientific calculator recently, first obtain the information in the table given in this section. On some calculators, you enter the angle measure (e.g., 46) and then press the tangent button to get the tangent ratio (e.g., 1.035530314). (Note that the data in the table have been rounded, in this case to 1.036.)
What if you have the h/d tangent ratio and want to find the corresponding angle? In that case, you'd enter the ratio first (e.g., 1.036) and then press the inverse of the tangent key (e.g., tan-1), which is usually a "second" function, to obtain the angle measure (e.g., 46.01298288). This number can also be rounded.
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