sincos, sincosf, sincosl - calculate sin and cos simultaneously

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ sincos(), sincosf(), sincosl()                                              │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       Before glibc 2.22, the glibc implementation did not set errno to EDOM when a domain error occurred.

       Several  applications need sine and cosine of the same angle x.  These functions compute both at the same
       time, and store the results in *sin and *cos.  Using  this  function  can  be  more  efficient  than  two
       separate calls to sin(3) and cos(3).

       If x is a NaN, a NaN is returned in *sin and *cos.

       If  x is positive infinity or negative infinity, a domain error occurs, and a NaN is returned in *sin and
       *cos.

       See math_error(7) for information on how to determine whether an error has occurred  when  calling  these
       functions.

       The following errors can occur:

       Domain error: x is an infinity
              errno is set to EDOM (but see BUGS).  An invalid floating-point exception (FE_INVALID) is raised.

       glibc 2.1.

       Math library (libm, -lm)

       sincos, sincosf, sincosl - calculate sin and cos simultaneously

       To  see  the  performance  advantage  of  sincos(),  it  may  be  necessary  to  disable  gcc(1) built-in
       optimizations, using flags such as:

           cc -O -lm -fno-builtin prog.c

       These functions return void.

cos(3), sin(3), tan(3)

Linux man-pages 6.9.1                              2024-05-02                                          sincos(3)

       GNU.

#define_GNU_SOURCE         /* See feature_test_macros(7) */
       #include<math.h>voidsincos(doublex,double*sin,double*cos);voidsincosf(floatx,float*sin,float*cos);voidsincosl(longdoublex,longdouble*sin,longdouble*cos);