Stan Math Library  2.20.0
reverse mode automatic differentiation
cosh.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_COSH_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_COSH_HPP
3 
4 #include <stan/math/fwd/meta.hpp>
5 #include <stan/math/fwd/core.hpp>
6 #include <cmath>
7 
8 namespace stan {
9 namespace math {
10 
11 template <typename T>
12 inline fvar<T> cosh(const fvar<T>& x) {
13  using std::cosh;
14  using std::sinh;
15  return fvar<T>(cosh(x.val_), x.d_ * sinh(x.val_));
16 }
17 
18 } // namespace math
19 } // namespace stan
20 #endif
T d_
The tangent (derivative) of this variable.
Definition: fvar.hpp:50
fvar< T > cosh(const fvar< T > &x)
Definition: cosh.hpp:12
T val_
The value of this variable.
Definition: fvar.hpp:45
var cosh(const var &a)
Return the hyperbolic cosine of the specified variable (cmath).
Definition: cosh.hpp:46
fvar< T > sinh(const fvar< T > &x)
Definition: sinh.hpp:11
This template class represents scalars used in forward-mode automatic differentiation, which consist of values and directional derivatives of the specified template type.
Definition: fvar.hpp:41

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