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<title>Trigonometric Functions for Complex Arguments - GNU Scientific Library -- Reference Manual</title>
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<h4 class="subsection">7.31.2 Trigonometric Functions for Complex Arguments</h4>
<div class="defun">
— Function: int <b>gsl_sf_complex_sin_e</b> (<var>double zr, double zi, gsl_sf_result * szr, gsl_sf_result * szi</var>)<var><a name="index-gsl_005fsf_005fcomplex_005fsin_005fe-802"></a></var><br>
<blockquote><p><a name="index-complex-sine-function_002c-special-functions-803"></a>This function computes the complex sine, \sin(z_r + i z_i) storing
the real and imaginary parts in <var>szr</var>, <var>szi</var>.
<!-- Exceptional Return Values: GSL_EOVRFLW -->
</p></blockquote></div>
<div class="defun">
— Function: int <b>gsl_sf_complex_cos_e</b> (<var>double zr, double zi, gsl_sf_result * czr, gsl_sf_result * czi</var>)<var><a name="index-gsl_005fsf_005fcomplex_005fcos_005fe-804"></a></var><br>
<blockquote><p><a name="index-complex-cosine-function_002c-special-functions-805"></a>This function computes the complex cosine, \cos(z_r + i z_i) storing
the real and imaginary parts in <var>szr</var>, <var>szi</var>.
<!-- Exceptional Return Values: GSL_EOVRFLW -->
</p></blockquote></div>
<div class="defun">
— Function: int <b>gsl_sf_complex_logsin_e</b> (<var>double zr, double zi, gsl_sf_result * lszr, gsl_sf_result * lszi</var>)<var><a name="index-gsl_005fsf_005fcomplex_005flogsin_005fe-806"></a></var><br>
<blockquote><p><a name="index-complex-log-sine-function_002c-special-functions-807"></a>This function computes the logarithm of the complex sine,
\log(\sin(z_r + i z_i)) storing the real and imaginary parts in
<var>szr</var>, <var>szi</var>.
<!-- Exceptional Return Values: GSL_EDOM, GSL_ELOSS -->
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