ccos(3) Library Functions Manual ccos(3) ccos, ccosf, ccosl - LIBRARY Math library (libm, -lm) #include double complex ccos(double complex z); float complex ccosf(float complex z); long double complex ccosl(long double complex z); z. : ccos(z) = (exp(i * z) + exp(-i * z)) / 2 attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |ccos(), ccosf(), ccosl() | | MT-Safe | +----------------------------+----------------------------------------------------------+--------------------------+ C11, POSIX.1-2008. glibc 2.1. C99, POSIX.1-2001. . cabs(3), cacos(3), csin(3), ctan(3), complex(7) Azamat Hackimov , Dmitriy S. Seregin , Dmitry Bolkhovskikh , Katrin Kutepova , Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . ccos(3)