double acos(double);
double asin(double);
double atan(double);
double atan2(double,
double);
double ceil(double);
double cos(double);
double cosh(double);
double exp(double);
double fabs(double);
double floor(double);
double fmod(double,
double);
double frexp(double,
int *);
double ldexp(double,
int);
double log(double);
double log10(double);
double modf(double,
double *);
double pow(double,
double);
double sin(double);
double sinh(double);
double sqrt(double);
double tan(double);
double tanh(double);
double gamma(double);
double hypot(double,
double);
double j0(double);
double j1(double);
double jn(int,
double);
double y0(double);
double y1(double);
double yn(int,
double);
double acosh(double);
double asinh(double);
double atanh(double);
double expm1(double);