CSIN (man3)
csin, csinf, csinl − complex sine function
csin, csinf, csinl − complex sine function
Tcl_AsyncCreate, Tcl_AsyncMark, Tcl_AsyncInvoke, Tcl_AsyncDelete, Tcl_AsyncReady − handle asynchronous events
asinh, asinhf, asinhl − inverse hyperbolic sine function
Tcl_UniCharToUpper, Tcl_UniCharToLower, Tcl_UniCharToTitle, Tcl_UtfToUpper, Tcl_UtfToLower, Tcl_UtfToTitle − routines for manipulating the case of Unicode characters and UTF-8 strings
bcopy − copy byte sequence
fmemopen − open memory as stream
Tcl_LoadFile, Tcl_FindSymbol − platform-independent dynamic library loading
Tcl_TraceVar, Tcl_TraceVar2, Tcl_UntraceVar, Tcl_UntraceVar2, Tcl_VarTraceInfo, Tcl_VarTraceInfo2 − monitor accesses to a variable
Tcl_RecordAndEvalObj − save command on history list before evaluating
Tcl_PkgRequire, Tcl_PkgRequireEx, Tcl_PkgRequireProc, Tcl_PkgPresent, Tcl_PkgPresentEx, Tcl_PkgProvide, Tcl_PkgProvideEx − package version control