csin(3) Library Functions Manual csin(3) csin, csinf, csinl - (libm, -lm) #include double complex csin(double complex z); float complex csinf(float complex z); long double complex csinl(long double complex z); z. : csin(z) = (exp(i * z) - exp(-i * z)) / (2 * i) attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |csin(), csinf(), csinl() | | MT-Safe | +----------------------------+----------------------------------------------------------+--------------------------+ C11, POSIX.1-2008. glibc 2.1. C99, POSIX.1-2001. cabs(3), casin(3), ccos(3), ctan(3), complex(7) () Azamat Hackimov , Dmitriy S. Seregin , Dmitry Bolkhovskikh , Katrin Kutepova , Yuri Kozlov , Kirill Rekhov ; GNU (GNU General Public License - GPL, 3 ) , - . - , , () () () <>. Linux 6.15 17 2025 . csin(3)