C# | Math.Asin()方法

The Math.Asin() method in C# returns the arcsine of a number in radians.

Syntax

The syntax for using the Math.Asin() method is:

public static double Asin(double d);

The method takes a parameter of data type double and returns its arcsine in radians.

Parameters

The parameter of the Math.Asin() method is:

• d - This parameter specifies the the value in the range of -1 to 1 whose arcsine is to be found.

Return Value

The Math.Asin() method returns a value in the range -π/2 through π/2.

Example

double value = Math.Asin(0.5);
Console.WriteLine(value); // Output: 0.523598775598299

In the example above, we have used the Math.Asin() method to find the arcsine of 0.5. The output is 0.523598775598299, which is the arcsine of 0.5 in radians.

Exceptions

The Math.Asin() method can throw the following exceptions:

• ArgumentException - If the value of the d parameter is greater than 1 or less than -1, the method throws an ArgumentException.

• ArgumentNullException - If the d parameter is null, the method throws an ArgumentNullException.

• NotFiniteNumberException - If the d parameter is either positive infinity, negative infinity or is Not-a-Number (NaN), the method throws a NotFiniteNumberException.

Conclusion

The Math.Asin() method is useful for finding the arcsine of a number in radians. It is a part of the System namespace and can be accessed easily in a C# program.