HP MLIB User's Guide Vol. 2 7th Ed.

810 HP MLIB User’s Guide
vsAcos, vdAcos The arccosine of the elements of a vector
Name vsAcos, vdAcos
The arccosine of the elements of a vector
Purpose vsAcos and vdAcos calculate the arccosine function of vector elements:
y[i] = acos(a[i]), for 0 <= i <= n-1
Usage VMATH:
#include <vmath.h>
void vsAcos (int n, const float a[ ], float y [ ] ) ;
void vdAcos (int n, const double a [ ], double y [ ] ) ;
VMATH8:
#include <vmath8.h>
void vsAcos (long long n, const float a[ ], float y [ ] ) ;
void vdAcos (long long n, const double a [ ], double y [ ] ) ;
Input n Number of elements to be calculated.
a Array of length at least n, specifying the input vector.
Output y Array of length at least n, specifying the output vector.