Arccos Calculator
Calculate the inverse cosine (arccos) of a value.
How to Use
- Enter a value between -1 and 1.
- Click 'Calculate' to find the inverse cosine (arccos) of the value.
- The result will be displayed in both degrees and radians.
- Click 'Clear' to reset the calculator.
About Arccosine (arccos)
In trigonometry, the arccosine is the inverse function of the cosine function. It calculates the angle whose cosine is a given number.
Domain and Range
The domain (input) of arccos(x) is [-1, 1]. The range (output) is [0°, 180°] or [0, π] radians.
Notation
arccos(x) can also be written as cos⁻¹(x) or acos(x).
Common Values
- arccos(1) = 0° (0 rad)
- arccos(0.5) = 60° (π/3 rad)
- arccos(0) = 90° (π/2 rad)
- arccos(-1) = 180° (π rad)
Applications
- Finding unknown angles in triangles using the Law of Cosines
- Calculating angles between vectors in physics and 3D graphics
- Solving mathematical equations involving cosine