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Arccos Calculator

Inverse cosine - find angle from cos value

Arccos (cos⁻¹) Calculator

Value (must be in [−1, 1] for sin/cos)

Arccos (inverse cosine, cos⁻¹) returns the angle whose cosine equals the input value. The output is in the range [0°, 180°] or [0, π] radians.

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