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SINPI(3) FreeBSD Library Functions Manual SINPI(3)
NAME
sinpi, sinpif, sinpil - half-cycle sine functions
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
double
sinpi(double x);
float
sinpif(float x);
long double
sinpil(long double x);
DESCRIPTION
The sinpi(), sinpif(), and sinpil() functions compute the sine of <pi> x
x. and measure angles in half-cycles.
RETURN VALUES
The sinpi(), sinpif(), and sinpil() functions returns sin(<pi> x x). If
|x| >= 2^(p - 1) where p is the floating-point precision of x, then the
returned value is +-0 and it has no significance.
SPECIAL VALUES
sinpi(+-0) returns +-0.
sinpi(+-n) returns +-0 for positive integers n.
sinpi(+-<infinity>) return an NaN and raises an FE_INVALID
exception.
sinpi(NaN) return an NaN and raises an FE_INVALID exception.
SEE ALSO
cos(3), cospi(3), fenv(3), math(3), sin(3), tan(3), tanpi(3)
AUTHORS
The half-cycle trignometric functions were written by Steven G. Kargl
<kargl@FreeBSD.org>.
STANDARDS
These functions conform to IEEE Std 754tm-2008 , "IEEE Standard for
Floating-Point Arithmetic" and to ISO/IEC TS 18661-4 , "Information
technology -- Programming languages, their environments, and system
software interfaces -- Floating-point extensions for C" -- Part 4:
Supplementary functions.
FreeBSD 14.0-RELEASE-p6 April 1, 2017 FreeBSD 14.0-RELEASE-p6