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Linux Programmer's Manual (3)
ctanh, ctanhf, ctanhl - complex hyperbolic tangent
double complex ctanh(double complex z);
float complex ctanhf(float complex z);
long double complex ctanhl(long double complex z);
Link with -lm.
The complex hyperbolic tangent function is defined
ctanh(z) = csinh(z) / ccosh(z)
These functions first appeared in glibc in version 2.1.
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Time: 21:42:59 GMT, July 12, 2014