Arccosine Calculator
Calculate the arccosine (arccos) of a value and get the angle in degrees, radians and gradians. Domain: −1 to 1.
Degrees (°)
Radians
Gradians
What is Arccos?
Arccos (arc cosine) is the inverse of the cosine: given a value x, it returns the angle θ such that cos(θ) = x. The result is always in the interval [0°, 180°].
Examples: arccos(1) = 0°, arccos(0.5) = 60°, arccos(0) = 90°, arccos(−1) = 180°.
Domain: −1 ≤ x ≤ 1. Values outside this range have no real arccos.
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