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Long Double Trigonometric Functions
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─────Run-Time Library───────────────────────────────────────────────────────
Include: <math.h>, <errno.h>
Syntax: long double _acosl( long double x );
long double _asinl( long double x );
long double _atanl( long double x );
long double _atan2l( long double y, long double x );
Returns: (_acosl) the arccosine result, or 0 if x is greater than 1
or less than -1.
(_asinl) the arcsine result, or 0 if x is greater than 1 or
less than -1.
(_atanl) the arctangent result.
(_atan2l) the arctangent result, or 0 if both arguments
are 0.
errno: EDOM
See also: cos, _cosl, sin, _sinl, tan, _tanl, _matherrl
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