The asin()
function, also called the arc sine
function, returns the inverse sine of a number.
The figure below shows the mathematical representation of the asin()
function.
Note: We need to import
Foundation
in our code to use theasin()
function. We can import it usingimport Foundation
.
To convert radians to degrees, use the following formula:
degrees = radians * ( 180.0 / pi )
asin(number)
//number can be real, float, or double.
This function requires a number as a parameter. The parameter must be a value between -1 and 1. If the value is outside -1 <= parameter <= 1, then asin()
returns NaN
.
asin()
returns the inverse sine of the number that is sent as a parameter. The return value lies in the interval [-PI/2, PI/2] radians.
The code below demonstrates how to use the asin()
function in Swift.
import Swiftimport Foundation//positive number in radiansprint("The value of asin(0.5) :", asin(0.5), "Radians");// negative number in radiansprint("The value of asin(-0.5) :", asin(-0.5), "Radians");//applying asin() and then converting the result in radians to degrees// radians = 0.5// PI = 3.14159265print("The value of asin(0.5): ",asin(0.5) * (180.0 / Double.pi)," Degrees");//error outputprint("The value of asin(1.5): ",asin(1.5));print("The value of asin(-1.5): ",asin(-1.5));
Foundation
header required for asin()
function.asin()
.asin()
.asin()
and convert the result to Degrees.asin()
.