Math

Arccos Calculator (Inverse Cosine)

Find the angle whose cosine is a given value.

Calculated Output

Angle (°) 60

Angle (rad) 1.047

Formula: θ = arccos(x)

Step-by-Step Breakdown

1. Values used:

2. Value (−1 to 1) = 0.5

4. Angle = 60°

5. Angle = 1.047rad

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The math behind it

arccos is the inverse of cosine, defined for inputs −1 to 1, with output in [0°, 180°].

arccos(0.5) = 60°.

How does it differ from arcsin's range?

Arccos returns 0°–180°, while arcsin returns −90°–90°.