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      std::tan(std::valarray)

      From cppreference.com
      <cpp‎ |numeric‎ |valarray
       
       
       
      std::valarray
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      Defined in header<valarray>
      template<class T>
      valarray<T> tan(const valarray<T>& va);

      For each element inva computes tangent of the value of the element.

      Contents

      [edit]Parameters

      va - value array to apply the operation to

      [edit]Return value

      Value array containing tangents of the values inva.

      [edit]Notes

      Unqualified function (tan) is used to perform the computation. If such function is not available,std::tan is used due toargument-dependent lookup.

      The function can be implemented with the return type different fromstd::valarray. In this case, the replacement type has the following properties:

      [edit]Possible implementation

      template<class T>valarray<T> tan(const valarray<T>& va){    valarray<T> other= va;for(T& i: other)        i= tan(i); return other;// proxy object may be returned}

      [edit]Example

      Run this code
      #include <cmath>#include <iostream>#include <valarray> auto show=[](charconst* title,conststd::valarray<double>& va){std::cout<< title<<" :";for(auto x: va)std::cout<<"  "<<std::fixed<< x;std::cout<<'\n';}; int main(){conststd::valarray<double> x={.0,.1,.2,.3};conststd::valarray<double> y=std::tan(x);conststd::valarray<double> z=std::atan(y);     show("x          ", x);    show("y = tan(x) ", y);    show("z = atan(y)", z);}

      Output:

      x           :  0.000000  0.100000  0.200000  0.300000y = tan(x)  :  0.000000  0.100335  0.202710  0.309336z = atan(y) :  0.000000  0.100000  0.200000  0.300000

      [edit]See also

      applies the functionstd::sin to each element of valarray
      (function template)[edit]
      applies the functionstd::cos to each element of valarray
      (function template)[edit]
      applies the functionstd::atan to each element of valarray
      (function template)[edit]
      (C++11)(C++11)
      computes tangent (\({\small\tan{x}}\)tan(x))
      (function)[edit]
      computes tangent of a complex number (\({\small\tan{z}}\)tan(z))
      (function template)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/numeric/valarray/tan&oldid=160831"

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