tan.hpp
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#ifndef STAN_MATH_REV_SCAL_FUN_TAN_HPP
#define STAN_MATH_REV_SCAL_FUN_TAN_HPP
#include <stan/math/rev/core.hpp>
#include <cmath>
namespace stan {
namespace math {
namespace {
class tan_vari : public op_v_vari {
public:
explicit tan_vari(vari* avi) :
op_v_vari(std::tan(avi->val_), avi) {
}
void chain() {
avi_->adj_ += adj_ * (1.0 + val_ * val_);
}
};
}
inline var tan(const var& a) {
return var(new tan_vari(a.vi_));
}
}
}
#endif
core.hpp
stan
Definition: log_sum_exp.hpp:8
std
Definition: std_numeric_limits.hpp:7
stan::math::var
Independent (input) and dependent (output) variables for gradients.
Definition: var.hpp:30
stan::math::var::vi_
vari * vi_
Pointer to the implementation of this variable.
Definition: var.hpp:42
stan::math::tan
fvar< T > tan(const fvar< T > &x)
Definition: tan.hpp:12

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