Arctan Inverse Tangent Function Calculator
y=arctan(x) Graph |
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![]() The usual principal values of the arctan(x) and arccot(x) functions graphed on the cartesian plane. |
y | x = arctan(y) | |
---|---|---|
degrees | radians | |
-1.732050808 | -60° | -π/3 |
-1.000000000 | -45° | -π/4 |
-0.577350269 | -30° | -π/6 |
0 | 0° | 0 |
0.577350269 | 30° | π/6 |
1.000000000 | 45° | π/4 |
1.732050808 | 60° | π/3 |
What is an Arctan (Inverse Tangent) Function Calculator?
An Arctan Calculator, also known as an Inverse Tangent Calculator, computes the arctangent (tan⁻¹ or atan) of a given number. The arctangent function returns the angle whose tangent is the input value.
For example:

Why Use an Arctan Calculator?
- Quick Calculations: Instead of manually solving for angles, the calculator provides instant results.
- Accuracy: Ensures precise values for scientific and engineering applications.
- Convenience: Works with degrees or radians based on your needs.
How Does It Work?
- Input: Enter a value (x) between -∞ and ∞.
- Processing: The calculator applies the formula θ = arctan(x).
- Output: Returns θ (angle in degrees or radians).
When Is It Used?
- Physics & Engineering: To determine angles in motion, forces, and wave calculations.
- Navigation & GPS: Used to compute direction angles from coordinate differences.
- Machine Learning & Data Science: Used in activation functions and angle normalization.
- Game Development & Graphics: Helps with rotations and perspective calculations.