tan


function template
<valarray> 
template<class T> valarray<T> tan (const valarray<T>& x);

Compute tangent of valarray elements

Returns a valarray object containing the tangents of all the elements of x.

This function overloads cmath's tan function.

Parameters

x
valarray containing elements of a type for which the unary function tan is defined. Each element's value represents an angle, expressed in radians.


Return value

A valarray object with the tangent values of the elements of x.

Example

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// tan 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 = tan (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;
}


Output:

foo: 1.2 3.14 5
bar: 2.57215 -0.00159265 -3.38052


See also

tan (cmath) Compute tangent (function)
sin Compute sine of valarray elements (function template)
cos Compute cosine of valarray elements (function template)
atan Compute arc tangent of valarray elements (function template)