catanh, catanhf, catanhl - complex arc hyperbolic tangent functions
double complex catanh(double complex z);
float complex catanhf(float complex z);
long double complex catanhl(long double complex z);
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2017 defers to the ISO C standard.
These functions shall compute the complex arc hyperbolic tangent of z, with branch cuts outside the interval [-1, +1] along the real axis.
These functions shall return the complex arc hyperbolic tangent value, in the range of a strip mathematically unbounded along the real axis and in the interval [-i/2, +i/2] along the imaginary axis.
No errors are defined.
First released in Issue 6. Derived from the ISO/IEC 9899:1999 standard.
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