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| <h3 class="section">2.2 <code>cacos</code>, <code>cacosf</code>—complex arc cosine</h3> |
| |
| <p><a name="index-cacos-156"></a><a name="index-cacosf-157"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <complex.h> |
| double complex cacos(double complex <var>z</var>); |
| float complex cacosf(float complex <var>z</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| These functions compute the complex arc cosine of <var>z</var>, |
| with branch cuts outside the interval [-1, +1] along the real axis. |
| |
| <p><code>cacosf</code> is identical to <code>cacos</code>, except that it performs |
| its calculations on <code>floats complex</code>. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| These functions return the complex arc cosine value, in the range |
| of a strip mathematically unbounded along the imaginary axis |
| and in the interval [0, pi] along the real axis. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| <code>cacos</code> and <code>cacosf</code> are ISO C99 |
| |
| <p><br> |
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