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Python cmath.acos() Method

❮ cmath Methods

Example

Find the arc cosine of a complex number:

#import cmath for complex number operations
import cmath

#find the arc cosine of a complex number
print (cmath.acos(2+3j))
Try it Yourself »

Definition and Usage

The cmath.acos() method returns the arc cosine of a complex number.

There are two branch cuts:

  1. Extends right from 1 along the real axis to ∞
  2. Extends left from -1 along the real axis to -∞.

Syntax

cmath.acos(x)

Parameter Values

Parameter Description
x Required. A number to find the arc cosine of

Technical Details

Return Value: A complex value, representing the arc cosine of a number. If the return value can be expressed as a real number, the return value has an imaginary part of 0
Python Version: 1.5

❮ cmath Methods