What is the sin() function in Swift?
Overview
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
Foundationin our code to use thesin()function. We can import it like this:import Foundation.
Syntax
sin(number)
//number can be real, float, or double.
Parameters
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 )
Return value
This function returns the sine of the number that is sent as a parameter. The return value will be between -1 and 1.
Example
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)));
Explanation
- Line 2: We add the
Foundationheader required for thesin()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.