Python - cmath.acosh() Function

The Python cmath.acosh() function is used to return inverse hyperbolic cosine of a complex number. The hyperbolic cosine of x is defined as:

There is one branch cut, extending left from 1 along the real axis to -∞, continuous from above.

Syntax

cmath.acosh(x)

Parameters

Return Value

Returns the inverse hyperbolic cosine of a value.

Example:

In the below example, acosh() function is used to find out the inverse hyperbolic cosine of a given complex number.

import cmath

x = 2 + 2j
y = 2
z = 2j

print(cmath.acosh(x))
print(cmath.acosh(y))
print(cmath.acosh(z))

The output of the above code will be:

(1.7343245214879666+0.8165471820968505j)
(1.3169578969248166+0j)
(1.4436354751788103+1.5707963267948966j)