Inverse Cosine (Arccos) Calculator — Formula
## Inverse Cosine (Arccos)
### Definition
**arccos(x) = the angle whose cosine is x**
### Domain and Range
- **Domain**: -1 ≤ x ≤ 1
- **Range**: 0° to 180° (0 to pi radians)
### Common Values
- arccos(1) = 0°
- arccos(0.5) = 60°
- arccos(0) = 90°
- arccos(-1) = 180°
### Definition
**arccos(x) = the angle whose cosine is x**
### Domain and Range
- **Domain**: -1 ≤ x ≤ 1
- **Range**: 0° to 180° (0 to pi radians)
### Common Values
- arccos(1) = 0°
- arccos(0.5) = 60°
- arccos(0) = 90°
- arccos(-1) = 180°
Esempio Risolto
Find arccos(0.5).
- arccos(0.5) = pi/3 radians
- = 60 degrees
- Verification: cos(60°) = 0.5