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Arccos Calculator

Arccos Calculator (Inverse Cosine)

The Arccos function (cos-1) returns the angle whose cosine is a given number. Input must be between -1 and 1.

4 decimal places
Common Arccos Values
xcos-1(x) in Radianscos-1(x) in Degreescos-1(x) in π Form
-1π180°π
-0.52π/3120°2π/3
0π/290°π/2
0.5π/360°π/3
100
√3/2π/630°π/6
√2/2π/445°π/4
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