# Python cmath - asinh() Function

The Python cmath.asinh() function returns the complex inverse hyperbolic sine of a complex number z. It is a function on complex plane, and has two branch cuts:

• Extends from 1j along the imaginary axis to ∞j, continuous from the right.
• Extends from -1j along the imaginary axis to -∞j, continuous from the left.

Mathematically, it can be expressed as: ### Syntax

```cmath.asinh(z)
```

### Parameters

 `z` `Required. `Specify the value.

### Return Value

Returns the complex inverse hyperbolic sine of z.

### Example:

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

```import cmath

z1 = 2 + 2j
z2 = 2
z3 = 2j

print("cmath.asinh(z1):", cmath.asinh(z1))
print("cmath.asinh(z2):", cmath.asinh(z2))
print("cmath.asinh(z3):", cmath.asinh(z3))
```

The output of the above code will be:

```cmath.asinh(z1): (1.7343245214879666+0.7542491446980459j)
cmath.asinh(z2): (1.4436354751788103+0j)
cmath.asinh(z3): (1.3169578969248166+1.5707963267948966j)
```

❮ Python cMath Module

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