#include <math.h>
float asinf(float arg);
double asin(double arg);
long double asinl(long double arg);

#include <math.h>
float acoshf(float arg);
double acosh(double arg);
long double acoshl(long double arg);

#include <math.h>
float acosf(float arg);
double acos(double arg);
long double acosl(long double arg);