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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.

The **cosh()**** function** returns the hyperbolic cosine of a number.

The figure below shows the mathematical representation of the `cosh()`

function:

Note:We need to import`Foundation`

in our code to use the`cosh()`

function. We can import it by using`import Foundation`

.

```
cosh(num)
```

This function requires a `number`

that represents an **angle in radians** as a parameter.

To convert `degrees`

to `radians`

, we use the following formula:

```
radians = degrees * ( PI / 180.0 )
```

The `cosh()`

function returns the hyperbolic cosine of a number sent as a parameter.

The code below shows how to use the `cosh()`

function in swift:

import Swiftimport Foundation//positive number in radiansprint("The value of cosh(2.3) :", cosh(2.3));// negative number in radiansprint("The value of cosh(-2.3) :", cosh(-2.3));//converting the degrees angle into radians and then applying cosh()// degrees = 180.0// PI = 3.14159265print("The value of cosh(180.0 * (PI / 180.0)) :", cosh(180.0 * (Double.pi / 180.0)));

Example of cosh() function in Swift

- Line 2: We add the
`Foundation`

header required for the`cosh()`

function. - Line 5: We calculate the hyperbolic cosine of the positive number in radians using
`cosh()`

. - Line 8: We calculate the hyperbolic cosine of the negative number in radians using
`cosh()`

.

- Line 13: We convert the angle in degrees to radians and then calculate its hyperbolic cosine using
`cosh()`

.

RELATED TAGS

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math

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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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