The **`cosh()` function** returns the hyperbolic cosine of a number. To be more specific, it returns the hyperbolic cosine of a number in the radians. 

Figure 1 shows the mathematical representation of the `cosh()` function.


> Note: The `math` module is required for this function.


# Syntax
```python
cosh(num)
```
# Parameter
This function requires a `number` that represents an `angle` in `radians` as a parameter.

In order to convert `degrees` to `radians`, use the following formula:
```python
radians = degrees * ( pi / 180.0 )
```

# Return value
`cosh()` returns the `hyperbolic cosine` of a number `(radians)` that is sent as a parameter.

# Example


import math

#positive number in radians
print "The value of cosh(2.3) : ",  math.cosh(2.3)

#negative number in radians
print "The value of cosh(-2.3) : ",  math.cosh(-2.3)

#converting the degrees angle into radians and then applying cosh()
#degrees = 180
#PI = 3.14159265
result = 180.0 * (math.pi / 180.0)
print "The value of cosh("+str(result)+") : ",  math.cosh(result)

What is math.cosh() in Python?

Returns the hyperbolic cosine of a number in radians using math module: `cosh(num)`.