Arccos Calculator

Introduction to the Arccos Calculator

The arccosine function (arccos) is the inverse of the cosine function. Given a value between -1 and 1, the arccos function returns the corresponding angle (in radians or degrees).

Mathematical Properties

• Domain: [-1, 1]
• Range: [0, π] radians or [0°, 180°]
• The function is monotonically decreasing over its domain.

Sample Values

• arccos(1) = 0° = 0 radians
• arccos(0.5) ≈ 60° = π/3 radians
• arccos(0) = 90° = π/2 radians
• arccos(-1) = 180° = π radians

How to Use the Arccos Calculator?

1. Enter a number between -1 and 1 (inclusive) in the text box.
2. Click the "Calculate" button, or press Enter on your keyboard.
3. The system computes and displays the result.
4. Click the "Example" button to auto-fill a valid sample value and compute the result immediately.