double dcos1(double);
double dcoshm(double);
double dcospx(double);
double dcshmm(double);
double dgam1(double);
double dgamma(double);
double dlnrel(double);
double drexp(double);
double drlog(double);
double drlog1(double);
double dsin1(double);
double dsinhm(double);
double dsinpx(double);