Stan Math Library  2.15.0
reverse mode automatic differentiation
tan.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_TAN_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_TAN_HPP
3 
4 #include <stan/math/fwd/core.hpp>
5 
6 namespace stan {
7  namespace math {
8 
9  template <typename T>
10  inline
11  fvar<T>
12  tan(const fvar<T>& x) {
13  using std::cos;
14  using std::tan;
15  return fvar<T>(tan(x.val_), x.d_ / (cos(x.val_) * cos(x.val_)));
16  }
17  }
18 }
19 #endif
fvar< T > cos(const fvar< T > &x)
Definition: cos.hpp:13
fvar< T > tan(const fvar< T > &x)
Definition: tan.hpp:12
var tan(const var &a)
Return the tangent of a radian-scaled variable (cmath).
Definition: tan.hpp:49

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