# Arc cosine of a complex number

Calculator for calculating the inverse cosine of a complex number

## Arc cosine calculator

The function returns the angle, which is the arc cosine of a complex number representing a cosine. The angle is given in radians.

To perform the calculation, enter the complex number. Then click on the 'Calculate' button.

Arc cos complex number calculator

 Input Complex number + i Decimal places 0 1 2 3 4 6 8 10 Result Angle

## Description of the arccosine

The arc cosine ( Arccos or Acos ) is the inverse of the cosine function. As their inverse functions, the arc cosine returns the associated angle from the cosine value.