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# What is math.cosh() in Python? Harris Amjad

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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.

Figure 1: Mathematical representation of hyperbolic cosine function

Note: The math module is required for this function.

## Syntax

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:

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)

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CONTRIBUTOR Harris Amjad

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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