The asin()
function, also called the arc sine
function, returns the inverse sine of a number. To be more specific, it returns the inverse sine of a number in radians.
The figure below shows the mathematical representation of the asin()
function.
Note:
std.math
is required for this function.
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.
-1 <= parameter <= 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 in radians. The return value lies in the interval [-PI/2, PI/2] radians.
The code below demonstrates how to use the asin()
function in D.
import core.stdc.stdio; import std.stdio; //header required for function import std.math; int main() { //positive number in radians writeln("The value of asin(0.5): ",asin(0.5) ," Radians"); // negative number in radians writeln("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 = 3.14159265 double result=asin(0.5) * (180.0 / PI); writeln("The value of asin(0.5): ",result," Degrees"); //error output writeln("The value of asin(1.5): ",asin(1.5)); writeln("The value of asin(-1.5): ",asin(-1.5)); return 0; }
asin()
function to convert 0.5
to radians
.asin()
function to convert result
into degree
.asin()
function to show error nan
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