cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ] #include <mathcw.h> extern float asinpif (float x); extern double asinpi (double x); extern long double asinpil (long double x); extern __float80 asinpiw (__float80 x); extern __float128 asinpiq (__float128 x); extern long_long_double asinpill (long_long_double x); extern decimal_float asinpidf (decimal_float x); extern decimal_double asinpid (decimal_double x); extern decimal_long_double asinpidl (decimal_long_double x); extern decimal_long_long_double asinpidll (decimal_long_long_double x);
NB: Functions with prototypes containing underscores in type names may be available only with certain extended compilers.
The inverse function, sinpi(x) = sin(pi * x), avoids range-reduction issues because the argument x is always an exact scaling of pi.
The value of x should be in the range [-1,+1].