Defined in header <valarray> | ||
---|---|---|
template< class T > valarray<T> cos( const valarray<T>& va ); |
For each element in va
computes cosine of the value of the element.
Parameters
va | - | value array to apply the operation to |
Return value
Value array containing cosines of the values in va
.
Notes
Unqualified function (cos
) is used to perform the computation. If such function is not available, std::cos
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:
- All
const
member functions ofstd::valarray
are provided. -
std::valarray
,std::slice_array
,std::gslice_array
,std::mask_array
andstd::indirect_array
can be constructed from the replacement type. - All functions accepting an argument of type
const std::valarray&
exceptbegin()
andend()
(since C++14) should also accept the replacement type. - All functions accepting two arguments of type
const std::valarray&
should accept every combination ofconst std::valarray&
and the replacement type. - The return type does not add more than two levels of template nesting over the most deeply-nested argument type.
Possible implementation
template<class T> valarray<T> cos(const valarray<T>& va) { valarray<T> other = va; for (T &i : other) { i = cos(i); } } |
Example
See also
applies the function std::sin to each element of valarray (function template) | |
applies the function std::tan to each element of valarray (function template) | |
applies the function std::acos to each element of valarray (function template) | |
computes cosine (cos(x)) (function) | |
computes cosine of a complex number (cos(z)) (function template) |
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