C++ Valarray::asin Function

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The C++ Valarray::asin()function generates a valarray holding the values of all the elements and computes the arc sine of each element's value.

The C++ asin() function returns the inverse sine of a radian-based integer. The asin() function of cmath is overloaded, and it is used once for each element.

Syntax

Following is the syntax for C++ Valarray::asin Function −

 asin (const valarray<T>& x); 

Parameters

x − It is containing elements of a type for which the unary function asin is defined.

Examples

Example 1

Let's look into the following example, where we are going to use the asin() function and retrieving the output.

 #include <iostream> #include <valarray> using namespace std; int main() { valarray<double> varr = { 1.6, -0.5, 0, -1 }; valarray<double> varr1; varr1 = asin(varr); cout << "The asin Valarray " << "Values : " << endl; for (double& x : varr1) { cout << x << " "; } cout << endl; return 0; } 

Output

Let us compile and run the above program, this will produce the following result −

 The asin Valarray Values : nan -0.523599 0 -1.5708 

Example 2

Following is the another example, where we are going to use the asin() function and retrieving the output with comparison of original and asin Valarray.

 #include <iostream> #include <valarray> using namespace std; int main() { valarray<int> myvalarr = { 10, 22, 33, 46, 28 }; cout << "The Orignal Valarray : "; for (int& ele : myvalarr) cout << ele << " "; valarray<int> asinvalarray = asin(myvalarr); cout << "\nThe asin Valarray : "; for (int& ele : asinvalarray) cout << ele << " "; return 0; } 

Output

Let us compile and run the above program, this will produce the following result −

 The Orignal Valarray : 10 22 33 46 28 The asin Valarray : -2147483648 -2147483648 -2147483648 -2147483648 -2147483648 

Example 3

Considering the another scenario, where we are going to use the asin() function with integral type and retrieving the output in radians, degrees.

 #include <iostream> #include <cmath> #define PI 3.141592654 using namespace std; int main() { int x = 1.6; double result; result = asin(x); cout << "asin(x) = " << result << " radians" << endl; cout << "asin(x1) = " << result*180/PI << " degrees"; return 0; } 

Output

Let us compile and run the above program, this will produce the following result −

 asin(x) = 1.5708 radians asin(x1) = 90 degrees