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* libc/locale/locale.c: Use double quotes in code. * libc/locale/locale.tex: Likewise. * libc/libc.texinfo: Hyphenate "floating-point". * libc/machine/necv70/necv70.tex: Likewise. * libc/stdio/sprintf.c: Likewise. * libc/stdio/sscanf.c: Likewise. * libc/stdlib/atof.c: Likewise. * libc/stdlib/ldtoa.c: Fix comment typo. * libc/stdlib/div.c: Use @ifnottex instead of @ifinfo. * libc/stdlib/ldiv.c: Likewise. * libm/common/s_expm1.c: Likewise. * libm/common/s_ilogb.c: Hyphenate "floating-point". Use "nonzero". * libm/common/s_infinity: Hyphenate "double- and single-precision". * libm/common/s_nan.c: Likewise. Also correct the FUNCTION summary. * libm/common/s_nextafter.c: Fix typo. Hyphenate "double-precision" and "floating-point". * libm/common/s_scalbn.c: Correct the FUNCTION summary. * libm/math/e_pow.c: Fix comment typo. * libm/math/math.tex: Hyphenate "single-precision" and "floating-point". * libm/math/s_asinh.c: Use @ifnottex instead of @ifinfo. * libm/math/s_atan.c: Likewise. * libm/math/s_frexp.c: Likewise. Also use "nonzero". * libm/math/s_isnan.c: Hyphenate "single-precision" and "floating-point". Use "nonzero". * libm/math/s_ldexp.c: Use @ifnottex instead of @ifinfo. * libm/math/w_acos.c: Likewise. * libm/math/w_acosh.c: Likewise. * libm/math/w_asin.c: Likewise. * libm/math/w_atan2.c: Likewise. * libm/math/w_atanh.c: Likewise. * libm/math/w_cosh.c: Likewise. * libm/math/w_exp.c: Likewise. * libm/math/w_exp2.c: Likewise. Add missing @end and missing @tex version of 2^x in the description. * libm/math/w_fmod.c: Use @ifnottex instead of @ifinfo. * libm/math/w_gamma.c: Likewise. * libm/math/w_hypot.c: Likewise. * libm/math/w_j0.c: Likewise. * libm/math/w_sinh.c: Likewise. * libm/math/w_pow.c: Replace "exp1.0nt" with "exponent". * libm/mathfp/mathfp.tex: Hyphenate "single-precision" and "floating-point". * libm/mathfp/e_acosh.c: Use @ifnottex instead of @ifinfo. * libm/mathfp/e_atanh.c: Likewise. * libm/mathfp/e_hypot.c: Likewise. * libm/mathfp/er_lgamma.c: Likewise. * libm/mathfp/s_acos.c: Likewise. * libm/mathfp/s_asine.c: Likewise. * libm/mathfp/s_asinh.c: Likewise. * libm/mathfp/s_atan.c: Likewise. * libm/mathfp/s_atan2.c: Likewise. * libm/mathfp/s_atangent.c: Likewise. * libm/mathfp/s_cosh.c: Likewise. * libm/mathfp/s_exp.c: Likewise. * libm/mathfp/s_fmod.c: Likewise. * libm/mathfp/s_frexp.c: Likewise. Also use "nonzero". * libm/mathfp/s_isnan.c: Hyphenate "single-precision" and "floating-point". Use "nonzero". * libm/math/s_pow.c: Replace "exp1.0nt" with "exponent". * libm/mathfp/s_ldexp.c: Use @ifnottex instead of @ifinfo. * libm/mathfp/s_sineh.c: Likewise. * libm/mathfp/w_jn.c: Likewise.
94 lines
1.8 KiB
C
94 lines
1.8 KiB
C
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/* @(#)z_acos.c 1.0 98/08/13 */
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/*
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FUNCTION
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<<acos>>, <<acosf>>---arc cosine
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INDEX
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acos
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INDEX
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acosf
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ANSI_SYNOPSIS
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#include <math.h>
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double acos(double <[x]>);
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float acosf(float <[x]>);
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TRAD_SYNOPSIS
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#include <math.h>
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double acos(<[x]>)
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double <[x]>;
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float acosf(<[x]>)
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float <[x]>;
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DESCRIPTION
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<<acos>> computes the inverse cosine (arc cosine) of the input value.
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Arguments to <<acos>> must be in the range @minus{}1 to 1.
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<<acosf>> is identical to <<acos>>, except that it performs
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its calculations on <<floats>>.
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RETURNS
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@ifnottex
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<<acos>> and <<acosf>> return values in radians, in the range of 0 to pi
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.
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@end ifnottex
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@tex
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<<acos>> and <<acosf>> return values in radians, in the range of <<0>> t
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o $\pi$.
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@end tex
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If <[x]> is not between @minus{}1 and 1, the returned value is NaN
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(not a number) the global variable <<errno>> is set to <<EDOM>>, and a
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<<DOMAIN error>> message is sent as standard error output.
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You can modify error handling for these functions using <<matherr>>.
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QUICKREF ANSI SVID POSIX RENTRANT
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acos y,y,y,m
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acosf n,n,n,m
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MATHREF
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acos, [-1,1], acos(arg),,,
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acos, NAN, arg,DOMAIN,EDOM
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MATHREF
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acosf, [-1,1], acosf(arg),,,
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acosf, NAN, argf,DOMAIN,EDOM
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*/
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/*****************************************************************
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* Arccosine
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*
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* Input:
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* x - floating point value
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*
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* Output:
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* arccosine of x
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*
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* Description:
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* This routine returns the arccosine of x.
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*
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*****************************************************************/
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#include "fdlibm.h"
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#include "zmath.h"
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#ifndef _DOUBLE_IS_32BITS
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double
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_DEFUN (acos, (double),
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double x)
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{
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return (asine (x, 1));
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}
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#endif /* _DOUBLE_IS_32BITS */
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