Trusted answers to developer questions

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.

In Swift, the **sin()**** function** returns the sine of a number.

The illustration below shows the mathematical representation of the `sin()`

function:

Note:We need to import`Foundation`

in our code to use the`sin()`

function. We can import it like this:`import Foundation`

.

```
sin(number)
//number can be real, float, or double.
```

This function requires a number that represents an angle as the parameter.

In order to convert degrees to radians, use the following formula:

```
radians = degrees * ( pi / 180 )
```

This function returns the sine of the number that is sent as a parameter. The return value will be between `-1`

and `1`

.

import Swiftimport Foundation//positive number in radiansprint("The value of sin(2.3) :", sin(2.3));// negative number in radiansprint("The value of sin(-2.3) :", sin(-2.3));//converting the degrees angle into radians and then applying sin()// degrees = 90.0// PI = 3.14159265print("The value of sin(90.0 * (PI / 180.0)) :", sin(90.0 * (Double.pi / 180.0)));

Calculating the sine of a number

- Line 2: We add the
`Foundation`

header required for the`sin()`

function. - Line 5: We use
`sin()`

to calculate the sine of the positive number in radians. - Line 8: We use
`sin()`

to calculate the sine of the negative number in radians. - Line 13: We use
`sin()`

to convert the angle in degrees to radians and calculated its sine.

RELATED TAGS

swift

sin()

math

communitycreator

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.

Keep Exploring

Related Courses