An online calculator to calculate inverse trigonometric function arccos(x) in radians and degrees.
How to use the calculator
1 - Enter x as a real number, within the domain of arccos function such that -1 <= x <= 1 and the number of decimal places desired then press "enter". Two answers are displayed: one in radians and the second in degrees.
You may use it to explore the domain and range of arccos(x).