Calculate inverse cosine (arccos) values in degrees and radians with MaiCalcs. Get precise results with domain validation and quadrant analysis.
• Domain: [-1, 1]
• Range: [0, π] or [0°, 180°]
• arccos(-x) = π - arccos(x)
• arccos(cos(x)) = x for x ∈ [0, π]
• arccos(1) = 0° = 0 rad
• arccos(√3/2) = 30° = π/6 rad
• arccos(√2/2) = 45° = π/4 rad
• arccos(1/2) = 60° = π/3 rad
• arccos(0) = 90° = π/2 rad
• arccos(-1) = 180° = π rad
Enter a value between -1 and 1 to calculate arccos