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FreeBSD 11.0 - man page for ctanhf (freebsd section 3)

CCOSH(3)						   BSD Library Functions Manual 						  CCOSH(3)

ccosh, ccoshf, csinh, csinhf ctanh, ctanhf -- complex hyperbolic functions
Math Library (libm, -lm)
#include <complex.h> double complex ccosh(double complex z); float complex ccoshf(float complex z); double complex csinh(double complex z); float complex csinhf(float complex z); double complex ctanh(double complex z); float complex ctanhf(float complex z);
The ccosh(), csinh(), and ctanh() functions compute the hyperbolic cosine, sine, and tangent of the complex number z, respectively. The ccoshf(), csinhf(), and ctanhf() functions perform the same operations in float precision.
cacosh(3), ccos(3), complex(3), cosh(3), math(3), sinh(3), tanh(3)
These functions conform to ISO/IEC 9899:1999 (``ISO C99'').
October 17, 2011 BSD

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