C# | Math.Asin() Method

Math.Asin() is an inbuilt Math class method which returns the angle whose sine value is given as a double value argument. If the argument is NaN, then the result will be NaN.

Syntax:

public static double Asin(double num)

Parameter:



num: It is the number that represents a sine and type of this parameter is System.Double. It must be greater than or equal to -1, but less than or equal to 1.

Return Type: Returns an angle Θ, measured in radians and its type is System.Double. Here the angle is always measured in radians, such that -π/2 ≤ Θ ≤ π/2.

Note: If the value of the num is greater than 1 or less than -1 or equals to NaN, then this method always returns NaN as result. To convert the radians(return value) to degrees multiply it by 180 / Math.PI. A positive return value always represents a counter clock-wise angle from the x-axis and a negative return value always represents a clockwise angle.

Examples:

Input  : Math.Asin(2)
Output : NaN

Input  : Math.Asin(0.3584)
Output : 0.366553473829125
     
Input  : Math.Asin(0.0)
Output : 0

Input  : Math.Asin(-0.0)
Output : 0

Input  : Math.Asin(Double.PositiveInfinity)
Output : NaN

Input  : Math.Asin(Double.NegativeInfinity)
Output : NaN

Program: To illustrate the Math.Asin() method

filter_none

edit
close

play_arrow

link
brightness_4
code

// C# program to demonstrate working
// of Math.Asin() method
using System;
  
class Geeks {
  
    // Main Method
    public static void Main(String[] args)
    {
        double a = Math.PI;
  
        // using Math.Asin() method
        Console.WriteLine(Math.Asin(a));
  
        // argument is greater than 1
        Console.WriteLine(Math.Asin(2));
          
        Console.WriteLine(Math.Asin(0.3584));
  
        double d = 0.0;
        double e = -0.0;
        double posi = Double.PositiveInfinity;
        double nega = Double.NegativeInfinity;
        double nan = Double.NaN;
  
        // Input positive zero
        // Output 0
        double res = Math.Asin(d);
  
        // converting to degree
        // i.e. output is 0 degree
        double rest = res * (180 / Math.PI);
        Console.WriteLine(rest);
  
        // Input negative zero
        // Output 0
        Console.WriteLine(Math.Asin(e));
  
        // input PositiveInfinity
        // Output NaN
        Console.WriteLine(Math.Asin(posi));
  
        // input NegativeInfinity
        // Output NaN
        Console.WriteLine(Math.Asin(nega));
  
        // input NaN
        // Output NaN
        Console.WriteLine(Math.Asin(nan));
    }
}

chevron_right


Output:

NaN
NaN
0.366553473829125
0
0
NaN
NaN
NaN

Reference: https://msdn.microsoft.com/en-us/library/system.math.Asin



My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.




Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.