◄Description► ◄Example► ◄Up► ◄Contents► ◄Index► ◄Back► ─────Run-Time Library─────────────────────────────────────────────────────── Include: <math.h> Syntax: long double _cosl( long double x ); long double _sinl( long double x ); long double _tanl( long double x ); Returns: (_cosl) the cosine of <x> if successful, or 0 if not. (_sinl) the sine of <x> if successful, or 0 if not. (_tanl) the tangent of <x> if successful, or 0 if not. errno: ERANGE See also: _acosl, _coshl, cos, _matherrl -♦-