<valarray>
template<class T> valarray<T> cos (const valarray<T>& x);
Compute cosine of valarray elements
Returns a valarray object containing the cosines of all the elements of x.
This function overloads cmath's cos function.
Parameters
- x
- valarray containing elements of a type for which the unary function cos is defined. Each element's value represents an angle, expressed in radians.
Return value
A valarray object with the cosine values of the elements of x.
Example
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// cos valarray example
#include <iostream>
#include <cmath>
#include <valarray>
using namespace std;
int main ()
{
double val[] = {1.2, 3.14, 5.0};
valarray<double> foo (val,3);
valarray<double> bar = cos (foo);
cout << "foo: ";
for (size_t i=0; i<foo.size(); ++i)
cout << foo[i] << ' ';
cout << endl;
cout << "bar: ";
for (size_t i=0; i<bar.size(); ++i)
cout << bar[i] << ' ';
cout << endl;
return 0;
}
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Output:
foo: 1.2 3.14 5
bar: 0.362358 -0.999999 0.283662
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See also
| sin | Compute sine of valarray elements (function template) |
| tan | Compute tangent of valarray elements (function template) |
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