Calculate arcsin, arccos, and arctan of a real number, in degrees.
| arcsin | – |
| arccos | – |
| arctan | – |
Use this calculator to recover an angle from a sine, cosine, or tangent ratio. Results are in degrees. Arcsin and arccos need |x| ≤ 1; outside that range they return n/a. Arctan is defined for every real x.
Principal values: arcsin(x) is in [−90°, 90°], arccos(x) in [0°, 180°], arctan(x) in (−90°, 90°). Other coterminal angles are not listed. For 0.5, arcsin is 30° and arccos is 60°.
x: The ratio. For arcsin/arccos, stay in [−1, 1].
arcsin: Angle whose sine is x, or n/a.
arccos: Angle whose cosine is x, or n/a.
arctan: Angle whose tangent is x (°).
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