< cpp‎ | numeric‎ | valarray
Defined in header <valarray>
template< class T >
valarray<T> sin( const valarray<T>& va );

For each element in va computes sine of the value of the element.


va - value array to apply the operation to

Return value

Value array containing sine of the values in va.


Unqualified function (sin) is used to perform the computation. If such function is not available, std::sin is used due to argument dependent lookup.

The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:

Possible implementation

template<class T>
valarray<T> sin(const valarray<T>& va)
    valarray<T> other = va;
    for (T &i : other) {
        i = sin(i);
    return other;


#include <iostream>
#include <valarray>
#include <cmath>
const double pi = std::acos(-1);
int main()
    std::valarray<double> v1 = {0, 0.25, 0.5, 0.75, 1};
    std::valarray<double> v2 = std::sin(v1 * pi);
    for(double n : v2)
        std::cout << std::fixed << n << ' ';
    std::cout << '\n';


0.000000 0.707107 1.000000 0.707107 0.000000

See also

applies the function std::cos to each element of valarray
(function template)
applies the function std::tan to each element of valarray
(function template)
applies the function std::asin to each element of valarray
(function template)
computes sine (sin(x))
computes sine of a complex number (sin(z))
(function template)