Arccos Calculator

The arccos calculator helps you calculate the inverse cosine function arccos in degrees and radians.

Enter the x value between -1 and 1 to calculate the arccos.

Inverse cosine, or arccosine, is the inverse of the cosine function. It measures the unknown angle when the lengths of two sides of a right triangle are known. It is also abbreviated as 'arccos'.

arccos x = cos-1x

Arccos calculator and formula

You might want to find the foci or calculate the cosecant.


  • (n.d.).
  • What is the difference between y = arccos x and y = cos-1 x? - GeeksforGeeks. (2022, April 22). GeeksforGeeks.
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