cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ] #include <mathcw.h> extern float acospf (float x); extern double acosp (double x); extern long double acospl (long double x); extern __float80 acospw (__float80 x); extern __float128 acospq (__float128 x); extern long_long_double acospll (long_long_double x); extern decimal_float acospdf (decimal_float x); extern decimal_double acospd (decimal_double x); extern decimal_long_double acospdl (decimal_long_double x); extern decimal_long_long_double acospdll (decimal_long_long_double x);
NB: Functions with prototypes containing underscores in type names may be available only with certain extended compilers.
The value of x should be in the range [-1,+1], for which the function range is [pi,0].