Inverse Tangent (Arctan) Calculator — Formula
## Inverse Tangent (Arctan)
### Definition
**arctan(x) = the angle whose tangent is x**
### Domain and Range
- **Domain**: all real numbers
- **Range**: -90° to 90° (-pi/2 to pi/2 radians)
Unlike arcsin and arccos, arctan accepts any real number as input.
### Definition
**arctan(x) = the angle whose tangent is x**
### Domain and Range
- **Domain**: all real numbers
- **Range**: -90° to 90° (-pi/2 to pi/2 radians)
Unlike arcsin and arccos, arctan accepts any real number as input.
Esempio Risolto
Find arctan(1).
- arctan(1) = pi/4 radians
- = 45 degrees
- Verification: tan(45°) = 1