Online arctan(x) calculator. Inverse tangent calculator.
The arctangent function is the inverse function of y = tan(x).
arctan(y) = tan-1(y) = x+ kπ
For every
k = {...,-2,-1,0,1,2,...}
For example, If the tangent of 45° is 1:
tan(45°) = 1
Then the arctangent of 1 is 45°:
arctan(1) = tan-1(1) = 45°
| y | x = arctan(y) | |
|---|---|---|
| degrees | radians | |
| -1.732050808 | -60° | -π/3 |
| -1 | -45° | -π/4 |
| -0.577350269 | -30° | -π/6 |
| 0 | 0° | 0 |
| 0.577350269 | 30° | π/6 |
| 1 | 45° | π/4 |
| 1.732050808 | 60° | π/3 |
In order to calculate arctan(y) on a calculator: