COTANDEG 3CW "25 January 2008" "mathcw-1.00"

Table of contents


NAME

cotandegf, cotandeg, cotandegl, cotandegw, cotandegq, cotandegll, cotandegdf, cotandegd, cotandegdl, cotandegdll - tangent function for argument in degrees

SYNOPSIS

cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ]

#include <mathcw.h>

extern float cotandegf (float x);

extern double cotandeg (double x);

extern long double cotandegl (long double x);

extern __float80 cotandegw (__float80 x);

extern __float128 cotandegq (__float128 x);

extern long_long_double cotandegll (long_long_double x);

extern decimal_float cotandegdf (decimal_float x);

extern decimal_double cotandegd (decimal_double x);

extern decimal_long_double cotandegdl (decimal_long_double x);

extern decimal_long_long_double cotandegdll (decimal_long_long_double x);

NB: Functions with prototypes containing underscores in type names may be available only with certain extended compilers.


DESCRIPTION

Compute the cotangent of x, where the argument is measured in degrees.

The argument is reduced exactly to the range [-90,+90] using the fmod() family before scaling from degrees to radians, and the cotangent of that value is then computed. Special cases of arguments at multiples of 45 degrees are handled separately.


RETURN VALUES

If the argument is finite, its cotangent is returned. Otherwise, a NaN is returned.

ERRORS

If the argument is a NaN, errno is set to EDOM, and the argument is returned. If the argument is +Infinity or -Infinity, errno is set to EDOM, and a quiet NaN is returned.

SEE ALSO

acos(3CW), acosp(3CW), acospi(3CW), asin(3CW), asinp(3CW), asinpi(3CW), atan(3CW), atan2(3CW), atan2p(3CW), atan2pi(3CW), atanp(3CW), atanpi(3CW), cos(3CW), cosdeg(3CW), cosp(3CW), cospi(3CW), cotan(3CW), cotanp(3CW), cotanpi(3CW), fmod(3CW), sin(3CW), sincos(3CW), sincosp(3CW), sincospi(3CW), sindeg(3CW), sinp(3CW), sinpi(3CW), tan(3CW), tandeg(3CW), tanp(3CW), tanpi(3CW).