function template
<valarray>
std::asin
template<class T> valarray<T> asin (const valarray<T>& x);
Compute arc sine of valarray elements
Returns a valarray object containing the principal values of the arc sine of all the elements of x, expressed in radians, in the same order.
The function calls acos (unqualified) once for each element.
This function overloads cmath's asin .
Parameters
- x
- valarray containing elements of a type for which the unary function asin is defined.
Return value
A valarray object with the arc sine values of the elements of x.
Example
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// asin valarray example
#include <iostream> // std::cout
#include <cstddef> // std::size_t
#include <cmath> // std::asin(double)
#include <valarray> // std::valarray, std::asin(valarray)
int main ()
{
double val[] = {0.0, 0.25, 0.5, 0.75, 1.0};
std::valarray<double> foo (val,5);
std::valarray<double> bar = asin (foo);
std::cout << "foo:";
for (std::size_t i=0; i<foo.size(); ++i)
std::cout << ' ' << foo[i];
std::cout << '\n';
std::cout << "bar:";
for (std::size_t i=0; i<bar.size(); ++i)
std::cout << ' ' << bar[i];
std::cout << '\n';
return 0;
}
Output:
foo: 0 0.25 0.5 0.75 1
bar: 0 0.25268 0.523599 0.848062 1.5708
See also
- asin (cmath)
- Compute arc sine (function)
- sin
- Compute sine of valarray elements (function template)
- acos
- Compute arc cosine of valarray elements (function template)