Arccos Calculator

Arccos Calculator

Arccos(x) calculator and Inverse cosine calculator are available here.

To calculate the arccos(x) on the calculator, you need to follow the following steps:

  • Enter the values in the  space provided.
  • Select the result type of degrees (°) or the radians (rad) in the combo box.
  • Then lastly hit the  =  button to calculate the final result.

[Math_m_Arccos_Calculator]

Arccos definition

The arccosine function is called as the inverse function of the cos(x).

arccos(x) = cos-1(x)

For instance,

If the cosine of 90° is : 0

cos(90°) = 0

Then the arccos of 0 is 90°:

arccos(0) = cos-1(0) = 90°

Arccos table

Find the values from the table provided below!

 X arccos(x)
 radians  degrees
 -1  π  180°
 -0.8660254  5π/6  150°
 -0.7071068  3π/4 135°
 -0.5  2π/3  120°
 0  π/2  90°
 0.5  π/3  60°
 0.7071068  π/4  45°
 0.8660254  π/6  30°
 1  0  0°

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