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| <h3 class="section">1.6 <code>asinh</code>, <code>asinhf</code>—inverse hyperbolic sine</h3> |
| |
| <p><a name="index-asinh-11"></a><a name="index-asinhf-12"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <math.h> |
| double asinh(double <var>x</var>); |
| float asinhf(float <var>x</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>asinh</code> calculates the inverse hyperbolic sine of <var>x</var>. |
| <code>asinh</code> is defined as |
| <pre class="smallexample"> sgn(<var>x</var>) * log(abs(<var>x</var>) + sqrt(1+<var>x</var>*<var>x</var>)) |
| </pre> |
| <p><code>asinhf</code> is identical, other than taking and returning floats. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| <code>asinh</code> and <code>asinhf</code> return the calculated value. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| Neither <code>asinh</code> nor <code>asinhf</code> are ANSI C. |
| |
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