1 #ifndef STAN_MATH_PRIM_MAT_FUN_ACOS_HPP
2 #define STAN_MATH_PRIM_MAT_FUN_ACOS_HPP
18 static inline T
fun(
const T& x) {
31 inline typename apply_scalar_unary<acos_fun, T>::return_t
Structure to wrap acos() so it can be vectorized.
var acos(const var &a)
Return the principal value of the arc cosine of a variable, in radians (cmath).
fvar< T > acos(const fvar< T > &x)
static return_t apply(const T &x)
Return the result of applying the function defined by the template parameter F to the specified matri...