Guide

1

There are generations of proven way that does not require something to be considered - use ready-made tables of values.For example - "Tables Bradis."Can be used as a classic, that is, paper, publishing and the electronic version in PDF.On the Internet it is possible to obtain a copy, ieit is not necessary to go to the store.By doing this, there will be only found in the table right the arc tangent.

2

However, having access to the network, not necessarily looking for ready-made lists of values can be found on-line calculators trigonometric functions.In comparison with the tables to use such services much more convenient.Moreover, they provide a much more advanced features, such as the calculation of the unit does not function, and the
whole formula composed of several operations with trigonometric functions.

3

can do without the Internet - a Windows has a built-in calculator that will allow to calculate, among other functions, too, and arctangent.By default, the calculator is started in its simplest form - without trigonometric functions.To reach them it is necessary to disclose in the menu "View" and click on the line with the inscription "Engineering."

4

In the extended calculator dial numbers you want to calculate the arc tangent.You can do this in three ways.The fastest - copy the value (CTRL + C) and paste (CTRL + V) in the entry field of the calculator.If no ability to copy, you can dial a number using the keypad or flip button calculator mouse cursor.After entering a value in any way necessary to select units for the calculation result.There are three options from which you must choose one, placing a mark in front of him in the selector by the input field number.Then tick the checkbox Inv - this way you let the calculator program that functions as indicated on its buttons, must be inverted.Left-click the button that says tg (tan) and a calculator it inverts (arctangent), applied to the value you set, and will result in these units.

Sources:

- arctangents