Online arctan(x) calculator. Inverse tangent calculator.
Arctangent calculator
In order to calculate arctan(x) with the online calculator:
- Enter the input value.
- Select result type of degrees (°) or radians (rad) in the right combo box.
- Press the = button to calculate the result.
Arctangent definition
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°
Arctangent table
| 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 |
Arctan on calculator
In order to calculate arctan(y) on a calculator:
- Press shift+tan buttons.
- Enter the angle.
- Press the = button.
Would you like to share your thoughts?