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# Python – cmath.acosh() function

cMath module contains a number of functions which is used for mathematical operations for complex numbers. The cmath.acosh() function returns the inverse hyperbolic cosine value of a complex number. The value passed in this function can be int, float, and complex numbers.

Syntax: cmath.acosh(x)

Parameter:This method accepts only single parameters.

• x :This parameter is the value to be passed to acosh()

Returns:This function returns the inverse hyperbolic value of a  complex number.

Below examples illustrate the use of above function:

Example #1 : In this example we can see that by using cmath.acosh() method, we are able to get the values of inverse hyperbolic by passing any value to it.

## Python3

 `# Python code to implement``# the acosh()function``       ` `# importing "cmath"``# for mathematical operations  ``import` `cmath ``   ` `# using cmath.acosh() method ``val ``=` `cmath.acosh(``3``) ``   ` `print``(val)`

Output:

`(1.762747174039086+0j)`

Example 2:

## Python3

 `# Python code to implement``# the acosh()function``       ` `# importing "cmath"``# for mathematical operations  ``import` `cmath ``   ` `# using cmath.acosh() method ``val ``=` `cmath.acosh(``2` `+` `5j``) ``   ` `print``(val)`

Output:

`(2.3830308809003258+1.1961255219693696j)`
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