Arctan (tan⁻¹) Calculator
Value (must be in [−1, 1] for sin/cos)
Arctan (inverse tangent, tan⁻¹) returns the angle whose tangent equals the input. Unlike arcsin and arccos, the domain is all real numbers (−∞, +∞).
- 1arctan(x) returns θ where tan(θ) = x
- 2Domain: all real numbers
- 3Range: (−90°, 90°) or (−π/2, π/2)
- 4arctan(1) = 45°, arctan(0) = 0°
arctan(1)=45° or π/4 radians
arctan(√3)=60° or π/3 radians
arctan(−1)=−45°
| x | arctan(x) degrees |
|---|---|
| −√3 | −60° |
| −1 | −45° |
| 0 | 0° |
| 1 | 45° |
| √3 | 60° |
| ∞ | 90° (asymptote) |
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