double acos(x)
double asin(x)
double atan(x)
double atan2(y, x)
double cabs(z)
double ceil(x)
double cos(f0)
double cosh(x)
double erf(x)
double erfc(x)
double exp(x)
double floor(x)
double fmod(x,y)
double gamma(x)
double hypot(x,y)
double log(x)
double log10(x)
double pow( x, y )
double sin(f0)
double sinh(x)
double sqrt(f0)
double tan(x)
double tanh(x)
/* Bessel functions */
double j0(x)
double j1(x)
double jn(n,x)
double y0(x)
double y1(x)
double yn(n,x)
/* single precision versions take float arguments and return float results *.
float racos(x)
float rasin(x)
float ratan(x)
float ratan2(y, x)
float rcos(f0)
float rcosh(x)
float rexp(x)
float rfrexp(value, eptr)
float rldexp(value, exp)
float rlog(x)
float rlog10(x)
float rsin(f0)
float rsinh(x)
float rsqrt(f0)
float rtan(x)
float rtanh(x)
