App description

ARctan inverse tangent function calculator

The inverse tangent function is a mathematical term that refers to the inverse of the function y=tanx.

The inverse of the function y = tanx, (x ∈ R), denoted y = arctanx, is called the arctangent function. Its value range is (-π/2, π/2). The inverse tangent function is one of the inverse trigonometric functions.

The usual principal values of the arctan(x) and arccot(x) functions graphed on the cartesian plane

<table class="pure-table"> <tbody> <tr> <th rowspan="2">y</th> <th colspan="2">x=arctan(y)</th> </tr> <tr> <th>degrees</th> <th>radians</th> </tr> <tr> <td>-1.732050808</td> <td>-60°</td> <td>-π/3</td> </tr> <tr> <td>-1.000000000</td> <td>-45°</td> <td>-π/4</td> </tr> <tr> <td>-0.577350269</td> <td>-30°</td> <td>-π/6</td> </tr> <tr> <td>0</td> <td>0°</td> <td>0</td> </tr> <tr> <td>0.577350269</td> <td>30°</td> <td>π/6</td> </tr> <tr> <td>1.000000000</td> <td>45°</td> <td>π/4</td> </tr> <tr> <td>1.732050808</td> <td>60°</td> <td>π/3</td> </tr> </tbody> </table>