acos.s fix: use the formula acos(x) = atan2(sqrt(1-x),sqrt(1+x))

[musl] / src / string / wcpcpy.c

#include <wchar.h>

wchar_t *wcpcpy(wchar_t *d, const wchar_t *s)
{
        return wcscpy(d, s) + wcslen(s);
}