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Next: <a href="Hyperbolic-Trigonometric-Functions.html#Hyperbolic-Trigonometric-Functions" accesskey="n" rel="next">Hyperbolic Trigonometric Functions</a>, Previous: <a href="Circular-Trigonometric-Functions.html#Circular-Trigonometric-Functions" accesskey="p" rel="previous">Circular Trigonometric Functions</a>, Up: <a href="Trigonometric-Functions.html#Trigonometric-Functions" accesskey="u" rel="up">Trigonometric Functions</a> &nbsp; [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Trigonometric-Functions-for-Complex-Arguments-1"></a>
<h4 class="subsection">7.31.2 Trigonometric Functions for Complex Arguments</h4>

<dl>
<dt><a name="index-gsl_005fsf_005fcomplex_005fsin_005fe"></a>Function: <em>int</em> <strong>gsl_sf_complex_sin_e</strong> <em>(double <var>zr</var>, double <var>zi</var>, gsl_sf_result * <var>szr</var>, gsl_sf_result * <var>szi</var>)</em></dt>
<dd><a name="index-complex-sine-function_002c-special-functions"></a>
<p>This function computes the complex sine, <em>\sin(z_r + i z_i)</em> storing
the real and imaginary parts in <var>szr</var>, <var>szi</var>.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fsf_005fcomplex_005fcos_005fe"></a>Function: <em>int</em> <strong>gsl_sf_complex_cos_e</strong> <em>(double <var>zr</var>, double <var>zi</var>, gsl_sf_result * <var>czr</var>, gsl_sf_result * <var>czi</var>)</em></dt>
<dd><a name="index-complex-cosine-function_002c-special-functions"></a>
<p>This function computes the complex cosine, <em>\cos(z_r + i z_i)</em> storing
the real and imaginary parts in <var>czr</var>, <var>czi</var>.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fsf_005fcomplex_005flogsin_005fe"></a>Function: <em>int</em> <strong>gsl_sf_complex_logsin_e</strong> <em>(double <var>zr</var>, double <var>zi</var>, gsl_sf_result * <var>lszr</var>, gsl_sf_result * <var>lszi</var>)</em></dt>
<dd><a name="index-complex-log-sine-function_002c-special-functions"></a>
<p>This function computes the logarithm of the complex sine,
<em>\log(\sin(z_r + i z_i))</em> storing the real and imaginary parts in
<var>lszr</var>, <var>lszi</var>.
</p></dd></dl>




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