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| <h3 class="section">2.8 <code>catanh</code>, <code>catanhf</code>—complex arc hyperbolic tangent</h3> |
| |
| <p><a name="index-catanh-168"></a><a name="index-catanhf-169"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <complex.h> |
| double complex catanh(double complex <var>z</var>); |
| float complex catanhf(float complex <var>z</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| These functions compute the complex arc hyperbolic tan of <var>z</var>, |
| with branch cuts outside the interval [-1, +1] along the |
| real axis. |
| |
| <p><code>catanhf</code> is identical to <code>catanh</code>, except that it performs |
| its calculations on <code>floats complex</code>. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| These functions return the complex arc hyperbolic tangent value, |
| in the range of a strip mathematically unbounded along the |
| real axis and in the interval [-i*p/2, +i*p/2] along the |
| imaginary axis. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| <code>catanh</code> and <code>catanhf</code> are ISO C99 |
| |
| <p><br> |
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