function template
<valarray>
std::tan
template<class T> valarray<T> tan (const valarray<T>& x);
Compute tangent of valarray elements
Returns a valarray containing the tangents of all the elements of x, in the same order.
The function calls tan (unqualified) once for each element.
This function overloads cmath's tan.
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
| // tan valarray example #include <iostream> // std::cout #include <cstddef> // std::size_t #include <cmath> // std::tan(double) #include <valarray> // std::valarray, std::tan(valarray) int main () { double val[] = {1.2, 3.14, 5.0}; std::valarray<double> foo (val,3); std::valarray<double> bar = tan (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: 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)