tan(3m) [opensolaris man page]

tan(3M) 						  Mathematical Library Functions						   tan(3M)

NAME

       tan, tanf, tanl - tangent function

SYNOPSIS

       c99 [ flag... ] file... -lm [ library... ]
       #include <math.h>

       double tan(double x);

       float tanf(float x);

       long double tanl(long double x);

DESCRIPTION

       These functions compute the tangent of their argument x, measured in radians.

RETURN VALUES

       Upon successful completion, these functions return the tangent of x.

       If x is NaN, a NaN is returned.

       If x is +-0, x is returned.

       If x is +-Inf, a domain error occurs and a NaN is returned.

ERRORS

       These functions will fail if:

       Domain Error    The value of x is +-Inf.

		       If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, the invalid floating-point exception is raised.

USAGE

       There are no known floating-point representations such that for a normal argument, tan(x) is either overflow or underflow.

       An  application	wanting  to  check  for  exceptions should call feclearexcept(FE_ALL_EXCEPT) before calling these functions. On return, if
       fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an exception  has  been  raised.  An  application  should
       either examine the return value or check the floating point exception flags to detect exceptions.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       atan(3M), feclearexcept(3M), fetestexcept(3M), isnan(3M), math.h(3HEAD), attributes(5), standards(5)

SunOS 5.11							    12 Jul 2006 							   tan(3M)

fmod(3M)						  Mathematical Library Functions						  fmod(3M)

NAME

       fmod, fmodf, fmodl - floating-point remainder value function

SYNOPSIS

       c99 [ flag... ] file... -lm [ library... ]
       #include <math.h>

       double fmod(double x, double y);

       float fmodf(float x, float y);

       long double fmodl(long double x, long double y);

DESCRIPTION

       These functions return the floating-point remainder of the division of x by y.

RETURN VALUES

       These functions return the value x - i * y, for some integer i such that, if y is non-zero, the result has the same sign as x and magnitude
       less than the magnitude of y.

       If x or y is NaN, a NaN is returned.

       If y is 0, a domain error occurs and a NaN is returned.

       If x is infinite, a domain error occurs and a NaN is returned.

       If x is +-0 and y is not 0, +-0 is returned.

       If x is not infinite and y is +-Inf, x is returned.

ERRORS

       These functions will fail if:

       Domain Error    The x argument is infinite or y is 0.

		       If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, the invalid floating-point exception is raised.

USAGE

       An application wanting to check for exceptions should call feclearexcept(FE_ALL_EXCEPT) before  calling	these  functions.  On  return,	if
       fetestexcept(FE_INVALID	|  FE_DIVBYZERO  |  FE_OVERFLOW  |  FE_UNDERFLOW) is non-zero, an exception has been raised. An application should
       either examine the return value or check the floating point exception flags to detect exceptions.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       feclearexcept(3M), fetestexcept(3M), isnan(3M), math.h(3HEAD), attributes(5), standards(5)

SunOS 5.11							    12 Jul 2006 							  fmod(3M)