From 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 14 Aug 2025 22:58:58 -0500 Subject: removing all downloaded devdocs files --- devdocs/c/numeric%2Fmath%2Fsinpi.html | 77 ----------------------------------- 1 file changed, 77 deletions(-) delete mode 100644 devdocs/c/numeric%2Fmath%2Fsinpi.html (limited to 'devdocs/c/numeric%2Fmath%2Fsinpi.html') diff --git a/devdocs/c/numeric%2Fmath%2Fsinpi.html b/devdocs/c/numeric%2Fmath%2Fsinpi.html deleted file mode 100644 index c6d70ab9..00000000 --- a/devdocs/c/numeric%2Fmath%2Fsinpi.html +++ /dev/null @@ -1,77 +0,0 @@ -

sinpi, sinpif, sinpil, sinpid32, sinpid64, sinpid128

Defined in header <math.h> 
float       sinpif( float arg );
-		 (1) (since C23) 
double      sinpi( double arg );
-		 (2) (since C23) 
long double sinpil( long double arg );
-		 (3) (since C23) 
_Decimal32  sinpid32( _Decimal32 arg );
-		 (4) (since C23) 
_Decimal64  sinpid64( _Decimal64 arg );
-		 (5) (since C23) 
_Decimal128 sinpid128( _Decimal128 arg );
-		 (6) (since C23)
Defined in header <tgmath.h> 
#define sinpi( arg )
-		 (7) (since C23)
-1-6) Computes the sine of π·arg measured in radians, thus regarding arg as a measurement in half-revolutions.
-7) Type-generic macro: calls the correct function based on the type of arg. If the argument has integer type, (2) is called.
- -

The functions (4-6) are declared if and only if the implementation predefines __STDC_IEC_60559_DFP__ (i.e. the implementation supports decimal floating-point numbers).

-		 (since C23)

Parameters

- -
arg - floating-point value whose product with π represents an angle in radians

Return value

If no errors occur, the sine of π·arg (sin(π×arg)) in the range [-1, +1], is returned.

-

Error handling

Errors are reported as specified in math_errhandling.

-

If the implementation supports IEEE floating-point arithmetic (IEC 60559):

-

Example

#include <errno.h>
-#include <fenv.h>
-#include <math.h>
-#include <stdio.h>
- 
-#ifndef __GNUC__
-#pragma STDC FENV_ACCESS ON
-#endif
- 
-#if __STDC_VERSION__ < 202311L
-// A naive implementation of a subset of sinpi family
-double sinpi(double arg)
-{
-    return sin(arg * (double)3.1415926535897932384626433);
-}
-#endif
- 
-int main(void)
-{
-    const double pi = acos(-1);
- 
-    // typical usage
-    printf("sinpi(1) = %f, sin(pi) = %f\n", sinpi(1), sin(pi));
-    printf("sinpi(0.5) = %f, sin(pi/2) = %f\n", sinpi(0.5), sin(pi / 2));
-    printf("sinpi(-0.75) = %f, sin(-3*pi/4) = %f\n", sinpi(-0.75), sin(-3 * pi / 4));
- 
-    // special values
-    printf("sinpi(+0) = %f\n", sinpi(0.0));
-    printf("sinpi(-0) = %f\n", sinpi(-0.0));
- 
-    // error handling
-    feclearexcept(FE_ALL_EXCEPT);
-    printf("sinpi(INFINITY) = %f\n", sinpi(INFINITY));
-    if (fetestexcept(FE_INVALID))
-        puts("    FE_INVALID raised");
-}

Possible output:

-
sinpi(1) = 0.000000, sin(pi) = 0.000000
-sinpi(0.5) = 1.000000, sin(pi/2) = 1.000000
-sinpi(-0.75) = -0.707107, sin(-3*pi/4) = -0.707107
-sinpi(+0) = 0.000000
-sinpi(-0) = -0.000000
-sinpi(INFINITY) = -nan
-    FE_INVALID raised

References

See also

-
-
(C99)(C99)
 computes sine (\({\small\sin{x} }\)sin(x))
(function)
-

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/numeric/math/sinpi -

-
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